This past year I purchased a beautiful Model 21 from Vintage Firearms Inc.
Lifted from 1 of his many internet listings is the following,
"We offer a 30 day mechanical warranty on this fine shotgun".

Is owner Mr. Shacter perfect? No.
Does he offer the most info and great pictures along with an extended warranty on his guns? Yes.

I hate when a dealer disavows any responsibility for the goods that they sell.