I constantly scam eBay for video cards, and it seems that dirt bags are now flogging fake video cards there. I report them as I see them as there are lots of legit deals there.
The brand Vamery sells NVIDIA based hardware but the stock drivers do not recognize the card. The description is not consistent with the model.
EG GTX 760 is 256-bit memory, the Vamery is 128-bit.
I suspect that jerks are using a modified video VBIOS to make the card appear to be more valuable, the actual card seems to be some older model that is worthless