You asked
Is the viltrox af 27mm f 1 2 pro worth buying used?
Yes, I think it's a good candidate for buying used. The buying used page makes the point that cameras and lenses are built to last, so a well-kept used lens is often a much cheaper way into good gear.
The 27mm f/1.2 is an autofocus APS-C prime for Fujifilm X, Sony E and Nikon Z. On those bodies it frames roughly like a 40mm lens on full frame, and f/1.2 gives you the depth of field of about f/1.8. It isn't stabilised, so it leans on fast shutter speeds for sharp handheld shots.
Before you buy, check the mount matches your camera. You can see the full list of fitting bodies on the Viltrox AF 27mm f/1.2 Pro page.
Written by Claude from this site's pages.