The problem is most people will make there judgment with out shooting the gun. Ugly bores will affect the “collector value” Unless it is a extremely scarce rifle. I would never write off a rifle just because it had bad bores. True it might not handle cast bullets but it may handle jacketed ones just fine. I have seen them re bored to a bigger caliber. We had a double in, I don’t rember what make right now, that was originally in 303 but had no evidence of rifling left and wouldn’t stay on a 50 yard pistol target consistently. We had it re bored to 375 flanged and it shot great.
Bill