I bought a Naples (Gen 1) Epyc CPU and mobo from eBay back in 2021. My understanding is that it was from Chinese data centers clearing out to make room for Rome (Gen 2), since they would have been running Naples for a while and it probably made sense to upgrade.
Overall, the experience was fine, although I will note the CPU was rather lightly packaged and the description didn’t make it clear if it came with the plastic alignment piece to install the CPU – it did.