Back in 1969, my dad had the opportunity to by a BMW 328 roadster, just like this:
Apparently, it was one of the factory racers, and it came with 2 crates of spares, and an extra engine. It had been hidden under a haystack in Germany during WW2, and the owner bought it while he was in the army and stationed in Germany after the war. The price? $1500. Dad passed on it since he had just purchased a 1941 Packard convertible for the princely sum of $700, and didn't have the extra cash. 14 yr old me was really pulling for it, but to no avail.