17. BMW 3-Series E30
People lust after those first-generation E30 M3 models. As a result, those boxy homologation specials are out of reach of the average collector. So what to do if you are desperately in love with the E30 shape, but you can’t afford a performance version?
All you need to do is buy any three-door E30 for a few bucks. Just put a big V8 up front to beat any M3 by a mile. Also, you get bonus points for installing a BMW V8. Better still, there are lots of choices, including high-end swaps like the 4.9-liter V8 from the E39 M5.