Yesterday's gun and ammo prices in today's dollars

[John Sukey (Deceased)]

Yeah, the seller got that wrong. The original error was in an early book on the Webley by W. Chipcase Dowell, reprinted in 1987 in a limited edition.
Green had a seperate shop with no connection to Webley. Unfortunately later researchers didn't catch the error and passed it on.
The later book, Webley Revolvers, by Gordon Bruce and Christian Reinhart printed in 1988 corrected the error, but it seems to have a charmed life.

Oh by the way I have one of those revolvers.