It has been about 3-4 months I am mining with my computer. I have seen these cards so cheap in Ebay that I want to buy bulks of them to build a cheap mining computer. I suspect the seller is a scammer although with very positive feedback or that the card in the link is a Chinese copy.
Be careful, most of them are just copies or chinese/vietnamese versions of each card, i tell you this because a friend of mine got scammed by this way a few months ago.
The best thing that you can do is just buy a new one on Newegg, most of sellers in there are reliable and won't scam you out.
And NEVER try to buy a used one.