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Ferrari 250 GTO: World's Most Expensive Cars

Built exclusively for racing by Enzo Ferrari, only 39 Ferrari 250 GTOs were assembled between 1962 and 1964. Powered by a 300-hp V-12 engine, the GTOs won three world championships — and in the decades since, have become the most sought-after collector vehicles in the world. A Ferrari 250 GTO set for auction in August will likely break the record for most expensive vehicle ever sold.