Nikon 400mm f/3.5 Ai
Things don't seem to be selling here but...
400mm f/3.5 ED Ai lens in good user condition. The lens barrel has quite a bit of cosmetic wear, scuffs, scratches, patina. Fortunately the glass is in excellent shape, except for some light specks of dust inside it's clean and clear. The previous owner kept a filter on the front since new. Focus is smooth and accurate, aperture clicks nicely. Comes with a UV drop in filter and front and rear caps.
You should really buy the 400mm f/2.8 I'm selling but if you can't afford that this will get the job done.
-$840 plus shipping.