You asked
Is the sony e 10 18mm f 4 oss worth buying used?
Yes, I think it's a sensible buy used. Lenses last a long time, and the used market is one of the best ways to get good gear for less. The 10-18mm f/4 OSS is a stabilised, autofocus wide zoom for Sony E-mount, and it frames like 15-27mm on full frame. That makes it a useful landscape and architecture lens for APS-C bodies, and it also works on many full-frame Sony E cameras in crop mode.
I can't give you a used price here, so check current listings against what it does for you. Look for a clean lens with no fungus or haze, and test the autofocus and stabilisation before you pay. For more on buying secondhand, see Buying used. The lens's full specs and compatible bodies are on its Sony E 10-18mm f/4 OSS page.
Written by Claude from this site's pages.