Edited for Syndication: The preview episodes aired during the standard run on March 13-14, 2008, with edits to remove any references to being previews.
Fan Nickname: Knock-Off has been called "Knock-Out" and "Wipe-Off" in reference to Wipeout. It's also been called "Rip-Off", which is probably the most accurate.
Name's the Same: There have been two other game shows/game show pilots with the name Temptation: a 1967 Heatter-Quigley show for ABC hosted by ArtJames where people picked prizes which got bigger and bigger; and a 1981 pilot produced by RalphAndrews involving audience members where they were all staked money and tempted with prizes.
Some champs walked away with nothing to show for their efforts, while losing contestants didn't even get their final score in cash. Several episodes even managed to give away a grand total of zero dollars.
The prizes were also generally significantly cheaper than the 1980s Sale: Instant Bargain prizes were usually around $500 to $1,000 (less than 1/4th the typical value of the prizes in the Jim Perry era if you adjust for inflation), and the top prize was just one mid-range car worth less than 1/8th the total typical Lot value from Sale (again, adjusted for inflation).
Out of Order: You'd think a show with returning champs and a growing Instant Cash jackpot would avert this on principle; however, you'd be wrong in this case. It seems the show would air consecutive episodes until someone retired, then skip to a different part of the run.
Screwed by the Network: Rossi Morreale said in an interview that MyNetworkTV put no money at all into advertising the show. (Considering how much of a trainwreck the show was, they may have made the right choice- they were likely forced to carry it because 20th Television (part of Fox, which owns MNTV) distributed it alongside Fremantle.)