how much do you think all that cost? I can understand "maintaining" a pistol cause it has sentimental value, and i'm going to answer before i've received your reply, but, what if all the cost of maintaining a pistol matches or exceeds the price of a new one? cause i know you can buy new buckmarks and rugers for 250-275, but from reading your post maybe all that cost only $40?
The P95's parts didn't need replacement, it was just something I chose to do. I think the recoil spring (factory) was $6, and the C-clip $0.75.
The Buckmark's firing pin was $40 (including gunsmith labor - it's the old style slide and pinned-in firing pin, not the new drop-in assembly). The polymer buffers were maybe $10, and the recoil buffer assembly was $6 (overstock clearance through Midway). So far, that's $56. If I have the slide and barrel reamed back to factory tolerances, it's $40 at a local gunsmith (though, I could probably do it myself, for the cost of a reamer rental).
Spending $96 on parts and repairs, over 25 years, is perfectly acceptable to me. If I had had to replace it every 10k rounds, I'd be looking at over $2,400 down the drain.
However - as BigJimP pointed out - If I had to replace the barrel, I would buy a new pistol (in this case, an exact replacement). But... I wouldn't toss the current Buckmark frame. I would put a threaded Trail-Lite barrel on it, and order a suppressor.
Perhaps I'm more demanding of a quality product. I just don't see anything under
maybe 25k rounds as being an acceptable failure point (for pistols). There are exceptions, though: If I bought an LCP, I wouldn't expect it to last 10k rounds. If I bought a Rohrbaugh, I would expect issues (being a new manufacturer, and relatively untested design). If I put max loads through my .44 Mag all the time (even being a Ruger), I wouldn't expect it to last as long as with plinking loads.