Is the ttartisan af 40mm f 2 worth buying used?

Here is what the site says about that.

From TTArtisan AF 40mm f/2: TTArtisan AF 40mm f/2: A prime lens by TTArtisan for Full frame cameras, 40mm f/2. Specs - Maker: TTArtisan - Focal length: 40mm (prime) - Maximum aperture: f/2 - Made for: Full frame sensors - Mounts: Sony E, Nikon Z, L-Mount - Stabilised: no - Autofocus: yes What it frames like - On full frame (Sony E, Nikon Z, L-Mount): as marked, 40mm. - On APS-C (Sony E, Nikon Z, L-Mount): like 60mm on ...

From Buying used: Buying used: Cameras and lenses are built to last, and many photographers upgrade often. That makes the used market one of the best ways to afford good gear. A body that's one or two generations old is often most of the camera for a fraction of the price.

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