I once bought a "new" hard drive from Amazon. It was an enterprise datacenter drive with thousands of hours. Someone had scrubbed the SMART statistics, but did not wipe the drive. They deleted the partition table, but it was still chock full of data. Mostly encrypted, but there was plenty of cleartext logs including runtime statistics for the rack the drive was in.

I'm about 85% sure it was a decommissioned Backblaze drive based on the logs I could see. This was probably 10 years ago, though.