Straight: Bob's car is old and rusty, tops out at 40 mph, and does not always start right away.
Exaggerated: All of the above, with the caveat that the car must be started using some non-conventional means, originally came from a country that no longer exists due to civil war, economic collapse, or a brutal invasion from a neighboring country, and has more duct tape than paint on it. It also breaks down about once a week, has been in the news more times than it's been on the road, uses ridiculous amounts of gas, has been mistaken for abandoned and/or stolen from a junkyard, and was once disqualified from a Soapbox Derby race for lack of structural integrity.
Bob's car is rather rusty and kinda ugly, but it works decently enough.
The car was a hand-me-down from a male relative (father, uncle, grandfather, older brother, older cousin, etc), who either loved 1970s cars, was a drunk driver, drives like a madman, or is too cheap or poor to get it fixed.
Bob is purchasing the car as part of an experiment for a reality show (or a science class), in which the car doesn't really need to move.
Bob is purchasing parts or scrap metal, not a whole car.
Bob is homeless and needs a car (no matter how much of a clunker it is) to live in rather than to drive around in.
Bob lives in a Communist country where manufacturing is of poor quality, and after ten years' wait he's glad to get a car at all.