Is the leica elmarit tl 18mm f 2 8 asph worth buying used?

Here is what the site says about that.

From Leica Elmarit-TL 18mm f/2.8 ASPH: Leica Elmarit-TL 18mm f/2.8 ASPH: A prime lens by Leica for APS-C cameras, 18mm f/2.8. A pancake, about 27mm equivalent. Specs - Maker: Leica - Focal length: 18mm (prime) - Maximum aperture: f/2.8 - Made for: APS-C sensors - Mounts: L-Mount - Stabilised: no - Autofocus: yes What it frames like - On APS-C (L-Mount): like 27mm on full frame; f/2.8 gives about the depth of field of f/4.2 there. - On the larger-sensor bodies ...

From Leica APO-Macro-Elmarit-TL 60mm f/2.8 ASPH: Leica APO-Macro-Elmarit-TL 60mm f/2.8 ASPH: A macro lens by Leica for APS-C cameras, 60mm f/2.8. A macro lens, about 90mm equivalent.

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