You asked
Is the panasonic lumix s 70 300mm f 4 5 5 6 macro ois worth buying used?
Here is what the site says about that.
From Panasonic Lumix S 70-300mm f/4.5-5.6 Macro OIS: Panasonic Lumix S 70-300mm f/4.5-5.6 Macro OIS: A macro lens by Panasonic for Full frame cameras, 70-300mm f/4.5-5.6. Specs - Maker: Panasonic - Focal length: 70-300mm (macro) - Maximum aperture: f/4.5-5.6 (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, 70-300mm. - On APS-C (L-Mount): like 105-450mm on full frame; f/4.5-5.6 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.
Quoted from this site's pages.