The Nikkormat is a great camera and built like a tank. It depends upon the condition and what you might have to pay for a CLA, but I think the price is more than reasonable. For a good comp, check the KEH web site.
As long as the lens has an actual aperture ring you should be fine. Without the aperture ring you're shooting at minimum aperture every time you release the shutter and your exposure will be way off.
The FT and FTN lack a split-image in the viewfinder, and only have a microprism grid in the middle. That will make using a slow zoom difficult because you must align your eye perfectly in both directions before the microprism becomes clear. With prime lenses, its focus screen will be fine.
Thanks for the info I may go back and look at it a little closer. I have some AI lenses that have the aperture ring. Just with having two of the N80 and N75 and an FM and F5 my wife may beat me for bringing in more cameras! Thats not including my Minolta collection of Maxxum and MD cameras. I like to collect old cameras and hope to have a display set up some time.
Marvin