Chinese are the masters when it comes to counterfeit goods. If they can make money on it they will counterfeit it. If your a seller what might help is posting a guide to other buyers can be aware of what the genuine and what the fakes look like, and how to tell them apart. 

Ebay my guides is quite handy. i did one years ago as the soccer market is flooded with fakes online and offline. Educating buyers with your experience will help future buyers to decide between quality and price.

Ebay is the shopping centre, and as long as everyone pays their rent on time they won't worry to much or have the time to monitor the millions of items sold in their mall.

Write an ebay guide, post up photos, let buyers know what the fake stores always look like, you might even have to buy one of their fakes so you can compare them.

Also contacting sports companies/ NRL or club teams helps also, they are loosing out dollars when ever merchandise is purchased and isn't official licensed merchandise.