Television commercials in general can sometimes be pretty hard to find once they stop airing, since there's no guarantee that anybody will think to record them and upload them online.
Not every hhgregg commercial is easy to find online. Even the compilation linked on its trope page doesn't contain all of them.
The online ads for the Indian antivirus software Protegent became wildly memetic after a Vinesauce stream featured them. Unistal, the creators of Protegent, eventually took down their original uploads of the ads, forcing anybody who still wants to see them to watch them through unauthorized reuploads.
Agrippa (a book of the dead) was penned by famed cyberpunk novelist William Gibson, illustrated by Dennis Ashbaugh and published by Kevin Begos Jr., the "Art" here consists of a book printed with quick fading ink and self-destructing floppy that accompany the deluxe version of the book, as well as a one-time-only live public reading. The only exceptions are:
A few copies of the book was printed with regular ink; these copies were sent to the Library of Congress as well as selected public libraries and museums, and are publicly accessible.
In one of the earliest recorded instances of Keep Circulating the Tapes and piracy via the Internet: a group of students managed to convince the radio station that they're documentarians and made a full video tape of the teleprompter, which is in fact a MacBook running a copy of said self-destructing floppy. A complete transcription of the poem appeared on the underground BBS MindVox the next day.
The poem is permanently available (for now) on William Gibson's website.
Akis was the very first Nicktoon to be produced in an Asian country (specifically Malaysia). It does not appear to have a home media release, and episodes are extremely hard, if not outright impossible to find online.
Israeli series M.K. 22 was never released on DVD, despite being the first primetime cartoon from the country and receiving critical acclaim.
Noonbory and the Super 7 did get a couple of DVD releases, but they only contain a few episodes each, and the combined episode count does not amount to all 26 episodes of the show. There are episodes uploaded to YouTube, but there's still a ways to go for all 26 episodes to be uploaded there. All of the episodes are available for purchase on said site, however.
Simple Samosaonly lasted half a year before Disney Channel India dropped it and stopped showing it in reruns without explanation, giving most of the episodes almost no time to be recovered and uploaded online. The show also has the added bonus of having a title that's so, well, simple that it's impossible to search for it without being given pages or videos for actual cooking recipes for samosas in the search results, making it more difficult to find episodes. It did eventually get reruns, but there are no serious preservation efforts from Indian fans and the prospects of seeing the show on any streaming services is pretty low due to its longevity (or lack thereof, in this case).
Pleasant Goat and Big Big Wolf manhua: The websites that hosted early manhua strips went down and CPE didn't put all of the manhua strips on their app, making some early strips hard to find.
Spoken word media
The LP recordings of The Hitch Hiker's Guide To The Galaxy are long out-of-print and it's not clear who owns the rights, so they're likely to remain that way. Many fans reckon the performances and pacing, especially on the first album, are better than the original radio series.
Trading show videos (also known as "footwear") is common among Broadway fans, who either like to collect everything their favorite performer has been in, to have a copy of a show that has never seen an official VHS/DVD release, or to check out international productions.
Pokémon Live!'s soundtrack CD had a very limited release and is impossible to find anywhere to buy. The show itself was supposed to get a home video release, but it never materialized.
In general, any toy that was around when one was a kid might be hard to obtain or run up to the hundreds or thousands once you're older.
This would pretty much apply to any Beanie Baby that's considered "rare" or was released as a special edition (e.g., the Eastern Zodiac Beanie Babies line, specifically the ones released in Asia) or anything from the Ty Classic line.
Any one-release (rare/special edition) as trying to get one can go up to about triple digits, even if secondhand. To add insult to injury, regular nendoroids and figmas tend to be pretty costly regardless.
This can also apply to a regular nendoroid, too. An example of this the case of the Bakugo nendoroid, as said nendoroid ran out quickly on both runs, leaving fans to turn to getting him secondhand.
This also applies to the Nendoroid More or Figma accessories, as, from what can be guessed, those are only single-release, so, if they're run out of or discontinued, anyone wanting these accessories will have to turn to other shops/venues to get them. Oh, said accessories tend to be pretty expensive, too.
Milky Way and the Galaxy Girls, a toy series created by Lauren Faust of My Little Pony: Friendship Is Magic fame. In 2016, the domains for the toyline's official website lapsed, meaning that the only way to obtain Milky Way toys now is to buy them second-hand. From what it seems, that idea seems to be impossible, as a search on websites like eBay or Amazon seems to only turn up the books.
Licca-chan: Because of the No Export for You trope, the only way to get these dolls is to either pay a large sum to have them imported (really, which could go up $1,000 plus), get them through third party sellers on sites like Amazon and eBay, or get them secondhand. The same also applies to the accessories.
For any discontinued characters or play-sets, as, the way to get them is to track them down through 3rd party sellers or thrift-shops. Unfortunately, on the 3rd party seller note, they can be pretty costly. While some sets do reenter production when there is popular demand, it is hard to predict which.
This can happen with current ones too, especially in North America, as the easiest way to get those is to go online (because few stores in the US sell them) and they tend to sell out pretty quickly. Like the above, getting them through 3rd party markets can be pretty expensive, even more so if importing from a country where they are more plentiful.
Want to start a collection of European Flick-to-Stick Bungees figures? If you can find some pre-owned ones, that may be your only option, as most of the blind bags and other similar products have sold out online.
Most ECW fans were supremely disappointed to find that one of the most powerful moments of the ECW One Night Stand reunion show, Sandman's entrance, was completely ruined for the DVD release due to the removal of not only Sandman's entrance music (Metallica's "Enter Sandman"), but also the crowd singing along to it. The original ECW may have replaced entrance themes for their home video releases themselves, but Paul Heyman was at least smart enough to get Motorhead to cover "Enter Sandman" so he could use their version for cheap without having to ruin the entire entrance.
Speaking of which, pretty much anything ECW that's not published by WWE certainly qualifies; now that the ECW Revival experiment has degraded into a B Show, it's doubtful we'll see any other new ECW DVDs.
Ditto for not fitting in their TV-PG policy.
And even before then, in the early-to-mid 1990s, there was the era of the "tape trades" (e.g., fans in Philadelphia would trade VHS tapes of ECW shows in their area to other fans in New York City for NYC-based shows). Obviously, this was long before the advent of the internet and streaming videos.
A popular dirtsheet story says that when Vince didn't allow Metallica to perform the song "St. Anger" live at a pay-per-view to promote the album of the same name, they later asked for an absurd sum for royalties every time Vince used "Enter Sandman", and that's why the One Night Stand DVD had the censored entrance. However, it's most likely just because it's licensed music and that now has absurd costs in general. Any of that is game for being edited out. Always has been to some extent (it was even seen in the 1980s in WWF Coliseum Video releases)
As mentioned above, any time licensed music is used for a particular wrestler, it's likely to be edited out in videos and rebroadcasts, especially if the WWE stops using the music. The most glaring example for a lot of fans is how "Real American" (which WWE still holds the rights to) is edited over "Eye of the Tiger" in replays of Hulk Hogan's earlier matches, which include his world title win over The Iron Sheik and the first WrestleMania.
For that matter, anything WWE-owned in their original forms (with original music, no blurring or censoring "WWF" utterances). Probably, then, all Chris Benoit matches for the forseeable future.
For compilation sets, yes. However, WWE's released several pay-per-views on DVD following Benoit's death that have Benoit matches in them, simply because editing them out is unavoidable (most notably, the SummerSlam Anthology featured every iteration of that event, including several shows Benoit performed on).
They managed to get around this for the Elimination Chamber anthology set by not advertising Benoit anywhere on the outer packaging (his name only appears on the chapter booklet and DVD menus) and removing any commentary during the Elimination Chamber match he was involved in that painted him in a positive light.
Thankfully in late 2012 WWE reached an agreement with the World Wildlife Fund (Now The "World Wide Fund For Nature") enabling them to stop the practice of blurring the WWF scratch logo and all utterances of the acronym. Meanwhile we're left with ten years worth of DVD collections marred by blurs, and its unclear how much will be re-released unedited.
WWE's 1999 Over the Edge event never has been, and never will be, released on any home video format in part or in whole; this is due to the death of Owen Hart.
Interestingly, on rare occasions highlights of The Undertaker's match with "Stone Cold" Steve Austin have been shown when discussing Undertaker's title history, but nothing else from the pay-per-view.
For that matter, nearly anything involving Owen Hart due to the multiple lawsuits his widow has filed against the WWE.
Typically, any regular televised episode of a wrestling show never sees the light of day again after it is aired except in the form of highlights. For wrestling fans who want to call out wrestling organizations for doing this, keep in mind many other sports leagues enforce similar practices - ESPECIALLY the NFL, which never even allowed games to be replayed on ESPN Classic during the network's early years when other leagues did.
No WCW pay-per-view was released on DVD by the organization while it still existed, and WWE hasn't released any DVDs of a WCW pay-per-view in its entirety, though they have made good use of WCW's tape library in "best-of" sets, including a three-disc DVD set dedicated to "the best of WCW and NWA Starrcade", AND a three-disc DVD set dedicated to "the very best of WCW Monday Nitro".
Now they are going to release "the very best of Clash of the Clampions".
Want to see a Ring of Honor show from before 2010? Better find a complication DVD of every wrestler involved in it and hope their matches from said show are included. This is a combination of losing half of their founders, their original distributor and a new DVD company not taking what was left of the old stuff over. They did eventually start releasing DVDs of years before 2010, counting down to the beginning, slowly. But slow's better than nothing.
Fortunately, WWE's launch of the WWE Network has helped curtail this problem, offering most of the promotion's full-length pay-per-views and television programs, the latter sometimes in their complete run, (mostly) uncut and uncensored. This means that every episode so far of WWE Rawnote Safe for the episode aired June 25, 2007, which was the tribute episode to Chris Benoit before the true circumstances of his death were revealed and WWE Smackdown can be streamed online through the network. Even then, not all of WWE's archives are available through the service, for various reasons including the reasons stated above.
Unless you have WWE Network, It it very HARD to find WWE Raw Episodes online (Especially the older ones.) YouTube and Dailymotion have a scattered amount of episodes available, But WWE has blocked the majority of the episodes on YouTube (although some of the episodes, mostly from 2011 and 2012, have remained.) A official YouTube Channel called 'wwegmtech' has every WWE Raw episode from June 2010 to July 2013 uploaded (although the 1000 Episode was never uploaded on there). The only downside? They're dubbed in Spanish.
The same goes to SmackDown. The Official WWE YouTube channel uploaded a majority of the episodes from 2010 and 2011, although some episodes were skipped (like the Super SmackDown live episodes). Like Raw, it's very hard to find old episodes from SmackDown unless you have WWE Network.
WWE Main Event is the same thing, although every episode is available on WWE Network. A couple of episodes were uploaded on YouTube, and the first 30 minutes of the August 21, 2013 episode is available on TV News Archive (although its mislabeled), but that's it.
WWE Saturday Morning Slam, a short-lived attempt by WWE to directly appeal to children's audiences, is not available on WWE Network and hasn't been seen since the program's only season ended in May 2013, when it aired on The CW. Better have recorded the series by then (although most of, but not all the episodes can be found on YouTube though, so there's that.)
WWE Network began adding matches from the Canadian promotion Stampede Wrestling in December 2015, only for them to pull all the footage several days later after Bret Hartnotified WWE that he had the rights to all Stampede matches featuring him. This stipulation doesn't apply to his appearances in other promotions however, including WWE.
While all of the episodes of WCW Monday Nitro are available on the WWE Network, the same can't be said for its companion show WCW Thunder, which didn't get added to the Network until 2018. And even then, only the show's first year and the first seven months of the 1999 shows were added. Given the show's role in causing WCW's demise, it's not that surprising WWE isn't enthusiastic about making the entire show available. Also, some episodes on the Network are presented incomplete due to master tape damage, which may partially explain the long wait. Fortunately, the following year saw the rest of the 1999 shows and the first two months of 2000 added to the network as well, so the wait for the whole series shouldn't be too long.
The WCW pay-per-view Collision in Korea is not available on the WWE Network, due to its notoriety of being one of few global wrestling events to be held in North Korea. This also applies to any WCW/NJPW co-production event (including Collision in Korea) due to the rights being tied up.
Hikuta: The Art of Controlled Violence, based on the book of the same name by Dok Lee (real name Lee Crull). In this video, Dok (which according to Crull stands for "Defender of Kings") Lee demonstrates the techniques of Hikuta, an allegedly ancient martial art dating back to the bodyguards of the Egyptian Pharaohs. Initially, it was available by mail order on VHS during the early 1990s if you knew where to look for it (mostly from ads in magazines such as Black Belt and Soldier of Fortune). Now, it is not known who owns the rights to the video since Dok Lee's death in 2000 and given the low budget, non professional quality nature of such productions (a regular instance in the martial arts community), it's not even certain if workable quality masters of the tape still exist.
Vanity plates in general can get hit very hard with this. A notorious practice done by distributors is "plastering"—the practice of replacing the original logo used on a print of a film or episodes of television series with newer or more modern logos. Whereas some logos get lucky and are preserved on re-distributed prints (usually if it's handled by the same studio), any logos on films / television series that end up having their rights given to a new owner are virtually guaranteed to have this happen to them in newer re-releases; upon which people will have to hunt for older prints/releases to see the original logo in question. For enthusiasts of vanity plates, these events can be especially painful as logos can sometimes get all sorts of neat changes over the years of their use, varying from slight subtle changes (intentional or otherwise) that can only be spotted on select examples, to having entire logo jokes that perfectly fit the attached film/television show in question. Not helping matters is that vanity plates from older films / television shows are also subject to film deterioration, so they don't look or sound quite as good as they were originally intended; or can end up being edited out for running time or squeezed down to a fraction of its size if attached to a show under syndication or attached to a "television network" cut of a film, so you can't even get a good look at the vanity plate in question (if you even see it at all).
The Closing Logos Wiki, a wiki site for vanity plates, acknowledges logo preservation/circulation through an "Availability" section for logo descriptions, which is Exactly What It Says on the Tin. Logos are given documentation on the films/television shows/etc. they appear on (and if they appear on later releases/prints of those properties), which are then used to rank logos on a scale of said availability; ranging from "very common" (logos that are widely used by the distributor, especially for plastering purposes) to "extinct/near extinction" (logos that can be found on ancient prints/releases, but have otherwise been replaced by other logos and/or are impossible to find).
Some logos were/are widely hated by enthusiasts for their omnipresence by way of plastering older logos. The Columbia/Tri-Star Television "Boxes of Boredom" (plastered over older Screen Gems and Columbia TV logos), the Sony Pictures Television "Bars of Boredom" (plastered over the same logos as the "Boxes of Boredom" and, ironically, the "Boxes of Boredom" themselves), and the 20th Television logo (plastered over older 20th Century Fox Television and MTM Enterprises logos) are but a few infamous examples.