Thirty-six cars were built. Every one of them is accounted for. Every one of them has a documented racing history, a chain of ownership that collectors and lawyers have traced with forensic precision, and a market value that has periodically set the record for the most expensive automobile ever sold at auction. The 1963 Ferrari 250 GTO is the car around which the collector market has constructed its most elaborate mythology, and the car whose actual driving experience most owners are too cautious about resale implications to describe honestly.