I used to carry a Makarov, because it was cheap and fit my hand well.
These days I can't imagine why I'd carry any C&R pistol, unless it was for fun as part of a costume or for a special event where a historical carry piece made thematic sense. You can get a Beretta Pico for $199 if you want a small reliable .380, and for a 9mm you can get plenty of good modern guns for way cheaper than most decent C&R pistols.
If you want to carry a C&R anyway, go for it. I wouldn't worry about normal carry/holster wear unless the gun was pristine factory-new condition, or is a gun you can't get consumable parts for (if you can't at least get new recoil springs you shouldn't carry the gun anyway). Just oil them so they don't rust from sweat.
Definitely replace the recoil spring of any old gun you plan to shoot, they are almost always worn well beyond when they should have been replaced. Wolff makes them for most guns.
ETA: I see you are talking about a P64. They are fine, just replace the recoil spring with a much stronger one (be sure to use a dremel or metal file to flatten the rear end to match the original spring or the slide won't want to function properly. I use the Wolff 22lb recoil spring (along with one of the hammer springs from the reduced power hammer spring pack, can't recall which one) and have never had a malfunction and it tames recoil a LOT. I'd highly recommend both it and the reduced power hammer spring. Just be sure to grind the back of the recoil spring flat to match the original or you'll have a bad time.