This can't possibly be legitimate. 8 BTC = $109 USD, which is just over half the going rate for these cards...
It isn't a new card, so the price is is of course lower then if you buy one new, also, if you include shipping to the US, that would make a total of 9.5 BTC (130 USD), what is a normal price for a second hand card, because I've heard from other people that they can buy new ones for around 160-170 USD