We see all the time collections of NBA fans sporting a different jersey every week questioning which team their heart lies with, or an NRL fan wearing their colours to show faith and pride on game day.
Usually, the authentic jerseys can run from anywhere between $50 and $100, depending on the store, and a knock off can be a dime a dozen. Depending on your commitment and your wallet, the two can be indistinguishable, so the value of the authenticity lies with the wearer and the importance of it.
These are a universal signal of praise and faith in your favourite team, or perhaps the sign of ones passion for the sport, either way, the location of the wearer can say it all.