I shoot with folks from the next county over who still plug away with .22's made in the 60's (if not 50's)- Darkgael is right, nobody is apt to live long enough to wear out a quality .22 bbl. The thing to watch out for is the muzzle- if it were cleaned much from the noisy end, it could have been dinked or ironed with the rod. Even then, .22 bores don't require a lot of cleaning so that will probably be a non-issue.
Rednecks... Keeping the woods critter-free since March 2, 1836. (TX Independence Day)
I'm going to use the words "clip" and "Long Colt" every chance I get. It grinds my gears to see new members attacked when we all know dang good and well what's being refered to.