Almost all my hard drives are used and I've yet to have a single failure. I still always buy a lot more than I need and keep my data triple redundant. This is the best case scenario when buying used.

Though do not EVER buy Seagates. I thought it was just a meme but the one I bought is a SMR shite that can't handle any random writing, spews bad sectors every now and then and bitrots a lot. Worst drive I've had, but it still runs.