Is the sigma 17mm f 4 dg contemporary worth buying used?

Here is what the site says about that.

From Sigma 17mm f/4 DG Contemporary: Sigma 17mm f/4 DG Contemporary: A prime lens by Sigma for Full frame cameras, 17mm f/4. A tiny metal ultra-wide from the I series; sold as the 17mm f/4 DG DN before 2025. Specs - Maker: Sigma - Focal length: 17mm (prime) - Maximum aperture: f/4 - Made for: Full frame sensors - Mounts: Sony E, L-Mount - Stabilised: no - Autofocus: yes What it frames like - On full frame (Sony E, L-Mount): as ...

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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