maybe he does not know that this coin is a fake, or maybe he does not care. This is a known Constans fake, the real thing was struck only in silver.
I have not added him to the fake seller list (yet) but it seems that I was watching this guy in the past, but don't remember for sure now.
I messaged him, but never heard back
craig20050
https://www.ebay.com/usr/craig20050