A rare 1957 BMW 507 Roadster is headed to the auction block in Monteray. Sporting a bold sea green exterior, this Roadster is one of the 252 cars produced and highly coveted. Despite being over 50 years old and having four previous owners, the car has only seen 73,000 kilometers of use and, needless to say, is in great shape. Featuring its original 145-hp V8 engine with a 4 speed manual transmission and dual-carburetors, this automobile is truly a rarity. Expected to sell for well over 2 million dollars, the 1957 BMW is one of a kind and will instantly transport you back in time. Check out pictures of the stylish speedster in the gallery above and find out more information on the 507 Roadster here.