Barry Halper's Collection of Baseball Memorabilia details the 2,500 plus collectibles that were sold through the famed auction house Sotheby's. CardShopFinder .Com's current listings of Baseball Card Shops, Sports Card Shops, and Trading Card Shops in the USA. I have a hard time making a case for Gary Sheffield, boy it seems that controversy always follows him, but still his career numbers are nice. “Two Connecticut collectors, Edward Golden a.nd Samuel Tanenbaum, are now with t.he Army Air Corps in training at Miami Beach, Florida. Not all cards or players cards will make you money, but taking care of your cards is something you can control. You can go your local card store. One way to sell them easier though is to sell them as a lot. The wide border on the edges of some sheets helped decipher the layout of at least 3/4ths of the sheet.