Type: Spezial Roadster
Price paid: $4.6 million
Engine: Supercharged 5.4-liter 8-cylinder
Auctioned by: RM Autions
Only 25 540 K Spezial Roadsters were ever built. Ordered in Germany just before the outset of World War II, this car was essentially mothballed during the war after driving only a few miles.
What happened to the car right after the war isn't known but it was ultimately discovered in the Soviet Union in 1967.
NEXT: 1935 Mercedes-Benz 500K