Used both of these sites without issue.
15 drive NAS that has been running for 6+ years, all refurb, have had 3 fail over the years: 2 eventually after years of service, 1 doa/didn’t pass my precheck (badblocks). The doa drive and one of the long drives were replaced by serverpartdeals and goharddrive with no issue, the other drive was actually rma’d by seagate despite being a refurb (initially supplied by spd and still had factory warranty).
Highly recommend