Gents - been following this discussion, even back to 2009, fairly early entries.
Really appreciate the knowledge gained here. I never knew, or noticed, barrel lengthening, for example. All good things to learn.
Also didn't know about any "collector's cartel". Learning to keep my eyes open at gun shows/sales.
I enjoy my hobby gunsmithing and building. Ten years ago, it was all modern stuff, selling and repairing. Trying to fit the customer to the firearm.
Then I acquired my first muzzleloader, black powder rifle in years. And truly enjoyed it, although it was an Italian import. I know I removed barrel, action, etc., from the stock, and was surprised that the stock only weighed a few ounces over two pounds!
From that point, it was "Can I build one of those?"
And from this discussion, I get the urge to actually go to, and try to buy something, at an antique firearm auction. All y'all have roped me in!
Currently I do have a very nice English double 15-bore, made mid-19th century, and nicely engraved, per period general designs. Lovely twist Damascus barrels. I have acquired appropriate wads and such and have a plentiful supply of 7 1/2 lead birdshot, legal in Ohio! Can't wait to get out to a range or trap-shoot. But now, there is a next one! Don't know where it is at the moment, nor what condition it is in. But I'll find it, and with my new knowledge, will be fairly well prepared.