Can some one explain why a jersey like this would receieve only a 5? what about the photo math mentioned in the description about the jersey being photomatched? I checked the image in ghetty's site and you really cant tell. But how is grade a 5 received? does that mean theres not much use? any input on this is greatly appreciated.

eBay: 1996 MARK McGWIRE GAME USED SIGNED JERSEY ATHLETICS COA (item 220014120882 end time Aug-11-06 16:57:08 PDT)