I note that John said he was looking at another gun, while his friend was looking at this one. I did not get the impression he was scamming some poor widow out of her late husbands treasure. Perhaps the seller from whom he bought it is the one who should be ashamed, but he didn't seem to know what he had, so may not have been intentional. Obviously someone didn't know at some point, but I don't see how you can default KyJohn on his find.

Miller/TN
I Didn't Say Everything I Said, Yogi Berra