The Mason Dixon auto auction is a used car auction. As of 2015, it is held in Greencastle, Pennsylvania, and it is open to both dealers and the general public.
As of 2015, auctions are held every Tuesday at 5:30 p.m. local time, and the auctions feature used cars. Anyone is invited to bid. The auction sells cars from a variety of sources, including private owners, banks repossessions, dealer trade-ins and vehicles donated for charity. Mason Dixon claims to sell over 2,000 vehicles every month at its auctions. Participants can view the vehicles that are in the next auction at MasonDixonAutoAuction.com.