should I buy a GPU used for bitcoin mining?

Solution
Point about mining is it tends to be a 24/7 operation and it's the cold-hot-cold cycle of boot-run-shutdown that actually does the most damage to a card, the constant expansion/contraction ultimately leads to metal fatigue in the solder joints and it's often this that leads to a failure. Assuming no mechanical failure of the fan/s that is. So it's actually better to have a card that's been run constantly!
Long way to say: Yes, but as lowriderflow points out, try to get some sort of original receipt you may be able to use any outstanding warranty, and AFAIK some companies will allow warranty transfer-EVGA and XFX did, but I'm not sure about now.
And if you're looking at an R9 290, either get one with a non reference cooler or expect to...
Point about mining is it tends to be a 24/7 operation and it's the cold-hot-cold cycle of boot-run-shutdown that actually does the most damage to a card, the constant expansion/contraction ultimately leads to metal fatigue in the solder joints and it's often this that leads to a failure. Assuming no mechanical failure of the fan/s that is. So it's actually better to have a card that's been run constantly!
Long way to say: Yes, but as lowriderflow points out, try to get some sort of original receipt you may be able to use any outstanding warranty, and AFAIK some companies will allow warranty transfer-EVGA and XFX did, but I'm not sure about now.
And if you're looking at an R9 290, either get one with a non reference cooler or expect to replace it shortly after installing it. ;)
 
Solution