With so many different variations of jerseys its hard to tell the difference between replica, replithentic, and the authentic jerseys since customers are not being provided with the proper information or pictures on ebay.  When people list a jersey being "Authentic", be sure to check with seller do they mean the jerseys the player actually wear or "Authentic" meaning it was actually purchased from a licensed retailer.  Be sure to know where you are buying your jerseys from.  I've experienced buying jerseys from out of country and found out they were fake jerseys.  The color was off and tag looks funny compared to the real jerseys.  If jerseys aren't from the US, be prepared to receive a counterfeit item.