I recently bought an 1873 .45-70 Springfield Trapdoor for less than $400. The reason the price was low is that the metal was reblued at some point, and the stock was refinished. The reblue looks like it was done by someone who knew what they were doing.
The wood is in great shape, the bore is very good - it will be a good shooter.
So, the question is - should I strip the blue to make it look more like its age or just leave it and shoot it.