I had some bad luck with buying a SAS harddrive on ebay, bought like 3 in a row from different sellers that turned out to be DOA. To be fair, I was going for the lowest cost I could find for the capacity I wanted and ignoring seller reputation, and I did get full refunds after returning them, it was just a pain to keep installing broken harddrives, documenting how they were broken, repacking them and making trips to the post office. The fourth I bought used from Amazon for a little more money and that one worked, I noticed it was also packaged better, in its own harddrive shaped styrofoam thing instead of crammed in a small box with a thin layer of bubble wrap. The whole elapsed process took months. If I had to do it again I'd probably try more non-Amazon sellers again and try to find one that does packaging better and doesn't try to sell broken shit because I hate Amazon but that is how it played out.