Enter one of RM Sotheby’s most recent auctions: one of just two 1993 964-based 911 Carrera RSR 3.8 ‘Strassenversions.’ As the story goes, Porsche built this specific 911 Carrera RSR 3.8 for a very special “Porsche VIP.” Being an “RSR,” which stands for “RennSport Rennwagen,” or “racing sport racing car” when translated to English from German, the RSR designates Porsche’s factory-built cup racecars.