Personally a 500 C/M. A 501 with the gliding mirror is great, but likely to be above your budget.
You NEED to research the screens, so that you can ID them. And presume that unless stated specifically, the screen in the camera is not likely to be a Acute Matt. Sellers may pull the AM screen to sell it separately at a high price. Similarly that AM screen box may not contain an AM screen, but the older screen that were swapped out to install the AM into the camera.
As for lens.
First you need to sit down and think of what you want as a lens kit; 50-80-150, 60-100-180, etc.
Most people get the standard 50-80-150, but there are good reasons for other lens combos.
What you want to avoid is buying a lens that you ultimately don't want, because you build a different kit.
Example, if you get the 80, then decide you want a 60-100-180 kit, what do you do with the 80? Better to decide on the kit, then get the lens that is part of the kit.
What lenses you finally end up with may be slightly different, due to cost and availability.
My original plan was 40-80-180,
- But then I discovered that the 40 was expensive, big and heavy, so I switched to the affordable and easier to handle 50 CF.
- Similarly the 180 was an expensive lens, and I found a 150 CF at a good price and got that instead.
- So I ended up with the standard 50-80-150 kit.
There were more lenses made for the 50-80-150 kit than other combos, so finding other lenses will be more difficult, and expensive.
Backs
I would get at least 2 backs, but you can start with 1.
While you can get by with 1 back, the benefit of backs is the ability to change films in mid roll, by swapping backs. So you can shoot both color and B&W, or shoot 2 different speed films. And if you are shooting portraits, it is faster and less disruptive to swap the backs than to stop and reload the 1 back.
CLA
A CLA of the gear might seem expensive, after spending the $$$ to buy the gear. But consider the CLA as resetting the timer, and you should be good for another 5-10+ years.
To me, the primary unknown is, how accurate is the shutter? Is it at least close to spec, or is it a stop or more off, because the grease has dried up in the gears, or something has broken?
Start with the body and primary lens in year1, then the secondary lens in year2, then the last lens in year3. That will spread out the CLA cost, so it isn't as painful as doing everything in year1.
Or just buy a lens that has been recently serviced.
gud luk