Blenheim, Ontario, CANADA -- RM Sotheby’s opened its online auction, The Art of Competition: Racing Posters, Tuesday (Feb. 18) and bidding will continue through Feb. 25.Photo: RM Sotheby'sAll offered without reserve, the posters celebrate events that took place from the 1940s through the 1990s at Silverstone, Snetterton, Le Mans, Riverside,...