Is the samyang af 12mm f 2 worth buying used?

Here is what the site says about that.

From Samyang AF 12mm f/2: Samyang AF 12mm f/2: A prime lens by Samyang for APS-C cameras, 12mm f/2. Specs - Maker: Samyang - Focal length: 12mm (prime) - Maximum aperture: f/2 - Made for: APS-C sensors - Mounts: Sony E, Fujifilm X, Canon RF - Stabilised: no - Autofocus: yes What it frames like - On APS-C (Sony E, Fujifilm X): like 18mm on full frame; f/2 gives about the depth of field of f/3 there. - 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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