Few postwar classic cars can match the insanely high prices commanded by the Ferrari 250 in its various forms. And of the forms that the 250 took, it is generally the 250 GTO and 250 GT SWB California Spider that fetch the very highest prices. These are prized because of their rarity, and with RM Auction set to auction off a 250 GT SWB California Spider soon, it has caught the attention of collectors everywhere. Not only were there just 56 units of the Spider produced, but only 16 of these units were built with open headlights, this 1961 model being one of those 16. RM auctions is therefore expecting the car to go for 11-13 million euros.