Loreo Asia has a fixed focus ‘Body cap’ style 35mm f5.6 to f64 (pinhole?) in several mounts including Nikon F for $27. These are all reflex camera mounts. They also have a PC version of same with limited shift, about 6mm, for $37 in the same choice of mounts. I believe these are plastic triplets with a rotating disc for apertures (so no setting half stops) and a blank part of the aperture disc that acts as a lens cap. They say at f5.6 the lens is soft focus, not surprised, probably set to a hyperfocal distance for f16 or there about.
Edit; This Loreo lens sounds like a much better value than what the OP found at ebay.