When the Dino 206 Berlinetta Speciale made its debut at the Paris Motor Show in 1965, car enthusiasts around the globe knew they had witnessed the birth of a game changer. More than 50 years later this revolutionary prototype continues to influence the design of supercars. After more than 20 years on display at the Le Mans museum, the Automobile Club de l'Ouest has decided to part ways with this one-of-a-kind classic. It's so unique, the ACO is having difficulty determining a price. Matthieu Lamoure, managing director of Artcurial, estimates the 1965 is worth somewhere between $4.28 million and $8.56 million.