Around my area(Oklahoma) it's not unusual to see a Trapdoor rifle or two on the gunstore used rack...maybe a rolling-block Remington on occasion.
Anyhow..almost invariably the old trapdoors will be rusted and still rusting...bore looking dry corroded and awful...no sign of oil or being cleaned for decades! This doesn't seem to be a phenomenon just limited to a few gunstores, but a wide-spread deal.
I could understand a consignment gun being sold 'as is'...gunstore employees not wanting to clean somebody else's musket they brought in dirty and rusty...however you would think it a simple matter to screw-on an extra section of cleaning rod(to get through 32.5" of bore) and clean the bore...maybe even wipe-down the exterior rust with an oily rag!
I know antique arms enjoy a differing set of grading where bore condition is less a concern than originality of parts and finish...but really?...Rust is bad!
So is this a common deal in other states too...and just what is the mindset of gunstore owners that let cool old antiques just rot-down on the rack??