Age doesn't really matter for most commercially built contemporary black powder imports, but bore condition does.
I have a .54 cal rifle I recently refurbished & it had been neglected some, but really only had one bad spot of pitting in the bore near the muzzle. Accuracy is superb - way beyond what I had expected.
Last weekend I saw a smokin' deal on a CVA - exterior looked brand new. The bore was beyond what I had ever imagined corrosion could do to steel - there was NO visible rifling left. Pitting & corrosion was cleaned up to be shiney, but the bore actually had a fuzzy appearance to it. Options would be to either rebarrel, or bore it out to make a smoothbore. Relining would be more costly than the rifle was worth.
Look at the bore on yours, if it's a little rough, but still shows strong rifling, maybe having more external abuse, it may still be a respectable shooter. If in doubt about bore condition or safety, take it to a KNOWLEDGEABLE & Honest gunsmith to get an informed opinion. I know of several to avoid, since they simply want to make a living replacing parts & their evaluations reflect that fact.
Ugly wood condition or worn exterior finish normally have no effect on a potentially fine shooter.
Get an honest evaluation about condition and resale value before possibly sinking more money into it than its' worth.