Originally Posted by Dan S. W.
Not the American market, but direct commentary from Diggory Hadoke on the market at issue:

A few years ago, a good Westley Richards boxlock would command £4,500 retail. Today half that would be more likely. Bonham’s sold a pair of Woodward side-locks last month for £10,000. They were bought in a gun shop a decade ago for £25,000 by a friend of mine.

Much as I hate to admit it, I bought my WR scalloped action boxlock (a 1960s vintage gun) about 10 years ago at a lot closer a retail price to the one "a few years ago" than the current market price. I guess it will fall to my children to dispose of, but they won't know and at that point I won't care.