(http://media.il.edmunds-media.com/mercedes-benz/sl-class/ns/mercedes-benz_sl-class_f34_ns_12312_196.jpg) A rare 1955 Mercedes-Benz 300 SL Alloy Gullwing, one of only 29 built, blew away pre-auction estimates, selling for $4.6 million, including the "buyer's premium," at the annual Gooding & Company Scottsdale Auction.
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