You asked
Is the sony e 55 210mm f 4 5 6 3 oss worth buying used?
Yes, I think buying this one used is a good move, especially if you shoot APS-C. The Sony E 55-210mm f/4.5-6.3 OSS is stabilised and autofocuses, and on APS-C it frames like roughly 82-315mm on full frame. It gets darker as you zoom in, so it suits daylight telephoto work better than low light.
It's made for APS-C, so pair it with an APS-C body like the Sony a6000 to get its full reach. It also fits many full-frame Sony bodies, but only in APS-C crop mode, at fewer megapixels.
Used gear is where the value is, so check the lens and body condition carefully. Budget for a new genuine battery too, since old ones lose capacity. The buying used page has the details.
Written by Claude from this site's pages.