Mecum Auctions

DENVER, CO - May 7: Mario Vettraino, left, and Rick Walker are checking inside of 1959 BMW Isetta 298cc/ 13hp 4stroke single cylinder. Mecum Auctions, the worlds largest collector-car auction company, returned to the Colorado Convention Center. The auction feature an estimated 600 American muscle cars, classics, Corvettes, Hot Rods, Resto Mods and more to cross the auction block. (Photo by Hyoung Chang/The Denver Post via Getty Images)