1964 Porsche 901 Cabriolet Prototype 15 December 2016 1964 Porsche 901 Cabriolet Prototype estimate €850.000-€1.000.000 sold for €649,600 / $693,132 Auction: RM Sotheby’s Paris 2017 Photo: Tim Scott Fluid Images © 2016 courtesy RM Sotheby’s