BMW E30 M3

Built to homologate BMW's Group A touring car, the E30 M3 got a hand-built S14 four-cylinder engine, box flares, a trunk-lid spoiler, and a chassis so perfectly balanced it won 1,436 races in its first five years of competition. Only 17,970 were produced between 1986 and 1991. It was the car that established M as a motorsport brand, not just a trim level. Clean examples now regularly exceed $100,000 — more than the original MSRP of $34,000 adjusted for inflation.