Anything that is worth collecting will differ in value because of many different factors. For instance, a Dallas cowboy’s jersey may not be of any value whatsoever to a New York Yankees fan.
To maintain the value of many sports memorabilia, the items must have no imperfections whatsoever. No stains, no tears, no wear around the edges, no fading colour, no chips, and no missing parts. On the flip side, there are items that are considered of greater value because they were used by the athlete. Avid fans will often go to great lengths to gain access to something an icon touched, wiped their sweat on, inserted their smelly feet into, or got grass stains on during a game.