I may want to sell a Nikkor 50mm 1.2 lens that I purchased to use with my Photomic FTN in the 1970s. The lens is a modified AI lens (modification done by Nikon). In looking at the 50mm 1.2 lens for sale on eBay, it appears that sellers are not specifying whether the lens is AI-modified or AI native. Or maybe I just don't know enough to tell. In looking at the rear of the lens, I know one distinguishing feature of the modified lenses is that they do not have the maximum aperture indicator post. My question is about the value of this lens. I don't see any eBay posts where the seller specifically points out the lens is modified. Therefore, I don't know if this lens would be in the $300-$500 range. Thoughts? I now use a Nikon D50 but with older eyes, using a manual focus lens is pretty much out of the question. ;-) Thanks.