I also prefer owning & shooting original firearms but when I started at a young age I was fortunate to have a gunsmith neighbor to educate me & show me how to evaluate the difference between wall hangers & how to bring potential shooters back to life & safe to shoot. Often it was simple as cleaning & oiling the lock & bore & installing a new flint or nipple.Nothing wrong with a gun 200 years old if it is still solid, I look for old guns and will go too them before a newer one.
Most of us are avid history buffs so hunting & competing with period firearms really adds to our enjoyment. Only downside is now 60+ years later these 150+ year old firearms remain in great shape but now my carcass is shot