Tom, I have a 460xxx ais from the eighties, I do not believe the optical formula is any different for the 60xxxx lenses. My lens is useless at 1.4 if there are point light sources in the frame, excellent at 2.0, really good at 2.8, and as good as anything else I own from 4.0 to 8.0 on the D800.
Go check this at flicker at 100% on the D800. If you want a nocturnal, this is not the lens, no matter the SN. IF the price is right I would not wait.
Thanks for the feedback! I think that my experience, should I buy this lens, might be different from yours since I will be shooting film with it. From what I gather, it is the digital cameras, especially the higher resolution ones that expose the flaws of this lens. I could be wrong on this but that is what I believe I have read.