The used Nikon 50mm f/1.2 AI-S is a manual focus lens that’s great for night photography. Key features include:

This is a specialty lens. If you don’t know about this lens, you probably don’t want it.

Classic Manual-Focus Specialty Lens. The 50mm f/1.2 isn’t the standard Nikon f/1.4 or 1.4G lens. It’s a still-produced, older-design, manual focus-only lens. It’ll auto meter on D5, D810, and D610 bodies, but will require manual metering on older bodies.

Renowned Sharpness. Photographers value this lens because it’s the only readily available f/1.2 prime lens for Nikon, and because at f/2 it’s supposedly the sharpest prime lens Nikon has ever made. It’s renowned for the 18-point stars it creates around light sources when shot-stopped down for night photography.