Football/ Soccer shirts and their prices  

HI fellow mylotters fan of football

I have been looking on the market for some football shirts. More specifically the ones from Manchester United(Toño Valencia ftw) and Juventus. I have noticed that on stores the price is of $70-80.

Now i have found on mercadolibre(the ebay affiliate from here and all south america) some shirts which prices goes from $40-50. My question is how is that even possible. I also checked on mancheter utd website and their price is $67(43 pounds). I ask a question to the seller and he said they are originals but are made in china for south american market and the quality is similar but not the same. I think this is a big farce.
There is only one user(yeah there are many) that has uploaded real photos. I cant really tell if they are real or not. He claims this shirt is made in Indonesia.

So mylotters do you know if this is true, do this big clubs authorized to make this shirt for south america or are they claiming this to make money, what do you think.