If this is what I think it is, the hard drives are used data centre drives that are sold as “renewed”. They wipe the drives then use manufacturer’s tools to reset the clocks, effectively the same as winding back the mileage clock in a car. They are sold cheaper than new drives, but not really at a price that reflects their age and true used status.

I bought 4x 14TB drives of this type, pretty sure they were listed as new, although some show as used. 1 drive was DOA and I’m still waiting on the refund.

You can see tons of them on diskprices.com