1959 Maserati 3500 GT Spyder Prototype by Vignale 12 January 2016 1959 Maserati 3500 GT Spyder Prototype by Vignale (est. $1,500,000 – 2,000,000) Not Sold Auction: RM Sotheby’s Arizona sale, January 2016 Photo: Darin Schnabel ©2015 Courtesy of RM Sotheby’s