Is the leica apo vario elmarit sl 90 280mm f 2 8 4 worth buying used?

Here is what the site says about that.

From Leica APO-Vario-Elmarit-SL 90-280mm f/2.8-4: Leica APO-Vario-Elmarit-SL 90-280mm f/2.8-4: A zoom lens by Leica for Full frame cameras, 90-280mm f/2.8-4. Specs - Maker: Leica - Focal length: 90-280mm (zoom) - Maximum aperture: f/2.8-4 (it gets darker as you zoom in) - Made for: Full frame sensors - Mounts: L-Mount - Stabilised: yes - Autofocus: yes What it frames like - On full frame (L-Mount): as marked, 90-280mm. - On APS-C (L-Mount): like 135-420mm on full frame; f/2.8-4 gives about ...

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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