You don't find the perfectly circular patch without tarnish to be suspicious? On both sides...
You are correct, the wear on the reverse is honest - notice how the orb, the diamonds and the bar all show even wear... And 58s can be at best moderately struck.
FWIW, the seller does ship internationally...
-----Burton
50+ year / Life / Emeritus
ANA member (joined 12/1/1973)
Life member: Numismatics International, CONECA
Member: TNA, FtWCC, NETCC, EveryCountry (online) coin club
Owned by three cats and a wife of 40+ years (joined 1983)
Author: 3rd Edition of the Sample Slabs book,
https://www.sampleslabs.info/