Originally Posted by x-ray
You shouldn't need a CLA unless you've been playing in the dirt with it or using it under extreme conditions. In fifty years of using Leica M's professionally I've only had a couple that required a CLA or repairs. I have 4 M's and my MP is the same age as yours and I've shot thousands of rolls through it and there's no indication of a CLA needed. Actually my M2 that ice owned almost 25 years needed a CLA ten years ago. It still had the Leica seal on it and I was the second owner and know it had never been tampered with. It had been sitting unused for most of its life because the original owner passed away not long after he bought it.
My mid 60's M3 finally needed a CLA three years ago so that's the extent of CLA's for the more than a dozen M's I've owned. Currently I have 4 that function perfectly.
Most likely it's just a simple adjustment.
Well, sort of. I've needed three repairs of film Leicas in about 49 years (and need two more at the moment, MP meter and M2 strap lug pulled out), but here's a story of five Leicas that belonged to a friend
. ALL need repair. But as you say, lack of use is a great cause of problems.
A decent mechanic will clean, lubricate and adjust the camera as needed in the course of a repair. A complete Leica-standard strip, clean and overhaul, restoring the camera to as new condition, cannot cost less than $600-700, and $1000-1200 is entirely possible. A bad "CLA merchant" will charge a few hundred for a skimped job which may actually accelerate wear and tear.