I generally view something like this as not worth the risk, but I have talked myself into it a couple of times, and I clearly benefited from good luck at least once. I bought two Brooks saddles from a Chinese eBay seller that, as far as I can tell after checking with Brooks themselves, are the real thing. I twice bought a bolus of things from a seller called AdrenalineWorld, or something to that effect, and while my two orders came through fine, I started seeing reviews pop up that people were being stiffed. Shortly after, the website disappeared. One rear light that I received from them arrived non-functional, but there was no recourse. That was the only loss [knocks wood].

If you proceed, proceed with caution. It may not just be your purchased items at risk, but also your identity, which is a much greater loss.