Is the leica macro elmar m 90mm f 4 worth buying used?

Here is what the site says about that.

From Leica Macro-Elmar-M 90mm f/4: Leica Macro-Elmar-M 90mm f/4: A macro lens by Leica for Full frame cameras, 90mm f/4. A collapsible, light 90mm. Specs - Maker: Leica - Focal length: 90mm (macro) - Maximum aperture: f/4 - Made for: Full frame sensors - Mounts: Leica M - Stabilised: no - Autofocus: no, manual focus What it frames like - On full frame (Leica M): as marked, 90mm. Cameras it fits - Leica M9: Full frame - Leica M9-P: ...

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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