Originality drives price of unrestored Porsche 550 Spyder to record-setting $6.1 million 1956 Porsche 550 Rennsport Spyder, chassis 550-0090. Photos courtesy Bonhams Auctions. Built from 1953 until 1956, Porsche’s 550 Rennsport Spyders have always been desirable cars. Most were raced in-...