FM2n.... I got mine on you-know-where for about $135. KEH is in that range for the 'bargain' rated ones which are in my experience with KEH in excellent shape. Watch for the high serial numbers (over 8,600,000 say; or at least over 8M) you are buying a camera that was built and sold in the late 80s or perhaps early 90s(??) (Do an internet search on the dates as I can't remember exactly.) Which isn't nearly so long ago as 1977 or 1980 or whatever. Which means you have a newer camera.
And they're great. Read about the FM2n and the FE2 on Cameraquest.
No one has talked about lenses. There is one absolutely priceless and reliable and fascinating site to read about Nikon lenses:
http://www.naturfotograf.com/lens_surv.html
My own brief and fairly knowledgeable (at this point) lens round up:
You can use Ai or Ai-S plus AF and AF-D lenses in manual mode. AF-S with a G doesn't work. If you happen upon a delightful pre-Ai lens the conversion is not that big a deal and there is a guy all the Nikonistas know (in Ohio, I think) who does it for not a lot of money. Check the Nikon forum on photo.net. Here are what I think are the three essentials:
Nikkor 28mm f/2.8 Ai-S (avoid the Ai version).
Nikkor 50mm f/1.8 Ai or Ai-S. (avoid the pancake, get the 'long nose' for better performance). If you must have the f/1.4 go for it; it too is excellent. Just so you know: the sharpest 50mm Nikon made was the little discussed f/2.0 which I think is only in Ai.
Finally, VERY IMPORTANT: the 105mm f/2.5 (Ai or Ai-S) is the most beautiful lens I own, including a few (not the best, obviously) Leicas. You must have one.
General notes: Avoid the Nikon 24mm in any permutation. They never made a good one. The 20mm is better, but pricey. Watch e-Bay. Some say the f/4 is great, some say not, only the f2.8. Me, I lust after the 18mm f/3.5 Ai-S.... which costs even more, like $750 on the used market. More than my first two cars. Combined.
All the 35mm lenses are expensive, except one little neglected gem: I had an E series (cheaper consumer line Nikon intro'd when they started getting their asses kicked by Sigma et al) 35mm f/2.5 that I loved. You can get that for under $50. I now have the f/2 Ai-S and haven't decided yet whether the cost
was worth it.
You can live w/o any of the Nikon 135s. They're not that great. Longer than that gets quite pricey except for a hidden gem: the Nikkor 200mm f/4. These are often only $60 or so and are light and sharp and rich in color and just a pleasure in every way.
So all together the FM2n at $135 and the 28/2.8 Ai-S at about that as well (breathtaking close up at 0.2m); and the 50mm f/1.8 at $50 and the 105/2.5 at $100 and the 200/4 at $60 --- you'll need about $500. But you can start off with the camera and the 50mm for under $200.
Enjoy. They're not graceful but they're classic; the Ford F150 of camera systems.
