Sports memorabilia is one of the largest and most popular of the collectibles catagories. Sports collectibles usually refers to items related to sporting events or the athletic participants. These items can range from signed autographs or sports items to trading cards, athletic apparel and any item related to sporting events or activities. The passion for sporting collectibles goes back to the start of the 20th century. Collectors are motivated in various ways. Some have collected items since childhood, while others are new to the game. The passion and its demand has led to the formation of a multi million dollar industry with some items selling for several million dollars each. The online marketplace is also robust with sites like Ebay listing several thousand items at a time for sale to the public. Each item worth is set by the marketplace. While the rare and hard to find items due have significant value. Items that are somewhat altered also carry demand from sporting collectors for their scarcity and uniqueness. Many site like http://www.iantiqueonline.com carry articles related to this collecting. Some have great information articles while other list prices and a marketplace for both buyers and sellers. While some share a passion for sporting collectibles others attempt to profit from fake merchandising. So for any item that is of value, it is always a good idea to have an expert evaluate and appraise items for their authenticity before spending large amount of money on unauthenticated items.