g-unit1111 :
Depends on where you're buying it from. Is the seller verified? Is the card in good condition? Can they verify that it is a legitimate 1070? If the answer to all these questions is "yes" then you should be good to go.
this is on offer up its like craigslist he has good ratings on the site so far and he sells a lot of cards
this is for a system I won't complete till black Friday to save money so I can't really test it.