I'd rather buy a used card from a professional miner than from an enthusiast gamer. The former card will have run at very stable thermals, while the latter will

I'd rather buy a used card from a professional miner than from an enthusiast gamer. The former card will have run at very stable thermals, while the latter will probably have gone through a lot of thermal stress resulting from heating up and cooling down, and component stress from power on/offs.