a good while back I went to a yard sale where a guy was selling off some old BP pieces, in rather rough shape. One was a bag full of original Colt 1860 Army, frame, barrel, grip frame from a Colt SAA, and some parts from Dixie Gun Works. The original cylinder was too worn to use, and the internals are all repro but most of this piece is original. The serial number places it at 1862.
I repaired this one from "relic" to "shooter" It took a while, using all hand tools, and an electric drill. It has some traces of rifling and it's not very accurate but being able to actually shoot a civil war pistol is pretty cool.
BTW, I paid $35 for the bag of parts and maybe $50 on the cylinder and a small piece of walnut.