I would concur that the pistol is most probably modern. I doubt that the proof marks are consistent with the period, but then again I may well be mistaken. The long gun appears to be an original.
I would say that for what you paid, you did quite well for the long gun, and as regards the pistol, it's a question of whether you like it well enough to hang it on your wall. I would suspect that it started out as a decoration and that someone tried with limited success to bring it into firing condition. As a 'wall hanger,' I think you paid a slightly above average price, but I'm certainly no expert, and my taste runs to the less ornate.
The long gun may well be in shootable condition, and if so, you got a great bargain. (even if not, as a decoration, it is a good deal.
I agree that you should have these guns checked out by a competent gunsmith, preferable one who knows something about muzzleloaders (I knew a fellow in the Fort Bragg area who was a fantastic 'smith when it came to any kind of cartridge weapon, but sent all his blackpowder questions to another gunsmith, because he knew that he knew nothing about muzzleloaders- you're looking for this kind of honesty and candor in a good craftsman).
On balance, I would say you did very well. Good luck with your project.
(by the way, remember that (a) this advice is free, and no doubt well priced... and (b) my opinion and a ticket will get you on the train)
:grin: