All I wanted was a nice mechanical 35mm camera to shoot maybe 10 rolls a month with. This is costing about the same as the upkeep on my car and I just wonder how many bodies will I have to keep around for parts before I can be confident that whatever body I'm using will work correctly.
While F2's were extremely solidly built, they were predominantly sold to and used by professionals. They in turn used them as their "day-in, day-out" cameras. No doubt, there are a few "cream puff" F2's out there, but as a first-order approximation assume any used F2 out there has over 30,000 shots on the clock and took a few hits for the team.
If you want to stay with Nikon and a pure mechanical camera, I suggest looking instead at a used FM2n. Physically, FM2n's weren't built as solidly as F2's, but I believe today's survivors are more likely to be reliable than F2's for several reasons.
The first reason is the shutter. The FM2 was the first SLR to use a honeycomb titanium shutter. While it was a significant advance over the F2's, the FM2n was better still. It could be damaged fairly easily by physical trauma, but such damage is readily visible.
The second reason is that
because of the lighter build, wear and abuse is more readily detectible. A quick look at the pressure plate will give you a good idea of how often the camera was used. Brassing showed up a bit earlier than on F2's as well.
A third reason is simply that the FM2 is a newer model.
But the main reason FM2n's are more likely to be reliable today is that many more were used either as backup cameras or by hobbyists. Especially in the latter case, they often ended up as "closet dwellers" for a decade or more after the buyer lost interest or decided they wanted more automation.
An FM3A is likely to be more reliable still, but unlike run-of-production FM2n's they retain substantial collector value.
So in summary, unless you're going to take advantage of professional features of the F2 (use of non-AI lenses, interchangeable finders, 100% finder coverage, etc), I don't recommend it as a part-time "user" camera.