1957 Mercedes Benz 300 SL Roadster 28 December 2017 1957 Mercedes Benz 300 SL Roadster, estimate $950,000 – $1,050,000 Sold for $1,083,000 Auction: RM Sotheby’s Arizona 2018 Karissa Hosek © 2017 Courtesy of RM Sotheby’s