Rare Porsche Collection Including 918 Spyder and 911 RSR Headlines RM Sotheby's Auction

Collection of 62 classic cars including 56 white Porsches going to auction by RM Sotheby's.

Highlights include a 2015 Porsche 918 Spyder expected to sell for $3 million.

Also a 1993 Porsche 911 Carrera RSR 3.8 with only 40 miles expected to reach $2.5 million.

1959 Porsche-Diesel Junior 108 S tractor with 14 hp engine and Art Deco bodywork could sell for $50k-$75k.

Auction includes other cars like a 1955 VW Beetle and 1994 Porsche 911 Turbo S X85 with funky pop-up headlamps.