Nice enough gun, almost certainly English, but priced at about 3 times what it's worth. And no information on proof status, chamber length, or barrel length.
This particular seller seems to be VERY impressed with his offerings.
Concur, overpriced. A tarted up, or partial restoration of a A&D Webley Action with a little known name applied. Not my cup of tea, but many do like the selective bluing of parts. A quick search of myLibrary did not find a listing on the labeled maker.
A popular small gauge ejector and 20ga is in demand, but watching the last few auctions far better guns could be had for the money even when accounting for the buyers premium and importation costs.
Further, not a lot of detail on the gun itself. The wall thickness is not specified, nor are proofs shown, much less chamber noted.