I need help deciding on buy a BRAND NEW Powercolor red devil Rx 580 or used sapphire nitro+ special edition. I found a new red devil for $138, while the used sapphire was $129 on eBay. What would you recommend? Obviously, the used sapphire might've been used for mining, so I am skeptical about that. I know the sapphire performs better than the red devil but is it worth to buy it instead?