In 1970 and 1971, Porsche won Le Mans back-to-back with the 917 and dominated circuits until rule changes outlawed its design.
A year later, racing boss John Wyer solved the 917's handling problems and used the same car to test for Le Mans, where it set the top speed and first wore the iconic Gulf colors. Factory driver Jo Siffert then bought the car, and when friend Steve McQueen needed vehicles to shoot his movie "Le Mans" during the 1971 race, Siffert loaned him his 917K. In the movie, Siffert's 917K takes the checkered flag after McQueen crashes.
The car would be shown in public again in October 1971, leading Siffert's funeral procession after his death in a British race, and shortly afterwards was bought by a French collector who parked it in a granary for 25 years. It's re-discovery in 2001 was a huge "barn find," and the new owner undertook a meticulous restoration of the car.
The most expensive Porsche auctioned to date was a 917 that brought $4.4 million in 2012, but a Ford GT40 that McQueen used as a camera car for "Le Mans" brought $11 million that same year. Other 917s in private hands have been valued at more than $10 million, and market trends have shown buyers willing to break all known records for a chance to own rolling pieces of racing, and Hollywood, history.