This isn't actually that difficult to figure out:
1. People want a bargain - if it's slightly broken it'll be a fixer-upper and a million and one goons will be convinced they can make good money on it. If it's missing some history or is a bit dicey then surely everyone else will stay away from it, so you must be getting it for cheap.
2. More people love small engined, small bodied cars - cheap to run and fix, surely, aren't they?
Please no one PM me asking if I know how women work, because I don't have that answer although most of it can be covered by 'psychotically'.