You asked

Is the tamron 25 200mm f 2 8 5 6 di iii vxd g2 worth buying used?

Here is what the site says about that.

From Tamron 25-200mm f/2.8-5.6 Di III VXD G2: Tamron 25-200mm f/2.8-5.6 Di III VXD G2: A zoom lens by Tamron for Full frame cameras, 25-200mm f/2.8-5.6. The second-generation version of the 28-200mm, now starting at 25mm. Specs - Maker: Tamron - Focal length: 25-200mm (zoom) - Maximum aperture: f/2.8-5.6 (it gets darker as you zoom in) - Made for: Full frame sensors - Mounts: Sony E - Stabilised: no - Autofocus: yes What it frames like - On full frame (Sony E): as marked, 25-200mm. ...

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.

From these pages