This is even more OBVIOUS from the outset, since the price of the SJ4000 is officially defined by the manufacturer, to bring all its distributors on an equal footing. So "cheap", and especially "really cheap" means NECESSARILY a scam!
E-commerce is a fair at all, and especially for scams, more and more numerous. There are a lot of Internet fraud in recent years and the phenomenon is growing, I am just now study the depth (I am a journalist).
I tested almost all e-commerce platforms available in France, and I confess that AMAZON is the best lloin management problems. However, I find still surprising for its own brand image, not better monitor hosted vendors. A strength to accept any small crook, AMAZON could permanently tarnish its reputation, while it is fairly simple to detect some obvious frauds ...
In any case and in conclusion, the hardware of major brands are REQUIRED to a substantially identical prices from one platform to another, and too attractive price means almost certainly a way early scam proof!
Open the eye, it is not the land of "bozounours", sorry!