Porsche 917 
Number made: 40-50
What one will cost you: $1-$3 million
Engine: 4.9 liter, twin-cam flat 12
Top speed: 200+ mph
0-60 mph: 3.8 seconds (est.)
History: The Porsche 917K was built for one purpose only: to win the 24 hours of Le Mans. It was so dominant there that the 917 spawned derivatives for other racing series, such as the 1,000 hp 917/30 Can-Am car, which itself was so devastating that it shut down the entire Can-Am racing series. The car pictured here is 917 number 23, the very car that brought Porsche its first Le Mans win. Raise your hand if you had a poster of this car on your bedroom wall.
Design: There was so little to the 917 racing car, and what was there was so purposeful, that the car couldn't help being beautiful. In 917K trim (K is for kurz, German for short), the car was at its purest, just a shelf of fiberglass to help the air hold the car to the ground. The vestigial bodywork was like a miniskirt: If you were driving behind one in a race, you'd get the full pornographic view of the Porsche's naked equipment.