I haven't heard of any issues but as it's used you lose the warranty so it better be cheap.
My goto better than average 1080p 60HZ gamer GPU is the 1060. So here's why I'd consider the 580:
How much is that used card?
So I'm planning to build a gaming desktop pc. When I look into the graphics card they are expensive. Then I found in an online store a 2nd hand RX 580, is it okay if I buy it?