Is the olympus m zuiko 40 150mm f 2 8 pro worth buying used?

Here is what the site says about that.

From Olympus M.Zuiko 40-150mm f/2.8 PRO: Olympus M.Zuiko 40-150mm f/2.8 PRO: A zoom lens by Olympus for Micro Four Thirds cameras, 40-150mm f/2.8. Specs - Maker: Olympus - Focal length: 40-150mm (zoom) - Maximum aperture: f/2.8 - Made for: Micro Four Thirds sensors - Mounts: Micro Four Thirds - Stabilised: no - Autofocus: yes What it frames like - On Micro Four Thirds (Micro Four Thirds): like 80-300mm on full frame; f/2.8 gives about the depth of field of f/5.6 there. ...

From OM System M.Zuiko 40-150mm f/4 PRO: OM System M.Zuiko 40-150mm f/4 PRO: A zoom lens by OM System for Micro Four Thirds cameras, 40-150mm f/4.

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