Yet another classic that ran away from me — the BMW 507. Originally sold at$9,000, they only sold 252 cars over a three-year run. (Elvis Presley owned one). It had a 150 or 160-horsepower V8 engine.
You could have picked one of these up in the 1990s for well under $100k — they now regularly go for $1-2m+.
Source: Classic Driver