Some cars value far exceeds the quality of the actual car. A couple that spring to mind are some of your favourites. An AE86 was outdated at launch being rear wheel drive (I know people think its cool) they rust like buggery and are pretty basic yet because of the "cult" thing they are worth loads. Think VW campers. Crap vehicles but because they are cool they are worth a fortune. Get a same age bedford van and its worth peanuts. Mk1 escorts are another one. They sold millions, they are still pretty common but stick in a 2 litre and everyone wants thousands, there were better cars at the time but no one wants them now.