Up for sale is a Nikon 24mm F2.8 ai w/ both end caps. I upgraded to a Sigma 24mm F1.8 so don't need it anymore. Front glass is clean and clear minus 2 very tiny looking lines but soo small won't show in shots. Rear glass is clean and clear. Focus is smooth and body shows some wear. The aperture clicks at every stop.
Looks to be the last generation AI version (notice uncolor second row of aperture markings, 3 screws, serial number starting with 666*** and no DOF marks on the chrome ring.)
Here is a photo of the AI-s version of the lens, linked to photosyhnthesis.co.nz. The lens for sale definitely appears to be the AI version which has essentially the same design, though the throw on the focus ring is much longer...