Porsche 959
Reference — shown, never scored
Why 6.3: The AWD template every modern supercar copied, wrapped around a raw twin-turbo flat-six and a manual gearbox period reviewers called heavy and agricultural in the best way. Never federalized for US sale — the Show-or-Display imports that exist mostly sit, precisely because the electronically-managed all-wheel drive that made it famous also filtered the feel.
Market value
Median asking price, good condition · $300k (2000) → $2.2M (2026), trending up · illustrative data
The long version
Show-or-Display is the whole ownership story: the US cars exist under an exemption that caps them at 2,500 miles a year, and most don't get close. Collectors treat the 959 as the thinking person's counterpart to the F40 — bought for what it pioneered rather than for what it transmits, which is exactly backwards from how this site scores. The technology that stunned 1987 needs factory-classic specialists today, so even willing drivers ration miles around service anxiety. The result is a blue chip that appreciates in silence.