Sports trading cards can be sold on a variety of websites, including eBay and Craigslist. Collections may also be sold to local vendors who traffic in such goods. Examples of these businesses include collectible stores, flea markets and possibly pawn shops.
According to The Cardboard Connection, eBay is the No.1 place to sell trading card collections. Selling trading cards on eBay ensures that the seller gets the actual market price due, in part, to the website's extreme popularity with collectors. Craigslist is another great option. Sports trading cards from the late 1980s and early 1990s don't carry much value due to the sheer number that were made during that time.