You asked
Is the nikon af s dx 18 55mm f 3 5 5 6g vr ii worth buying used?
Yes, if it's cheap. The 18-55mm f/3.5-5.6G VR II is a stabilised, autofocus zoom for APS-C Nikon bodies, and it was the kit zoom on many older entry DSLRs. It's a useful everyday lens, but it won't hold its value like a good prime or pro zoom, so I wouldn't pay much for it. Check that the zoom and focus move smoothly and that the VR stabilisation works before you buy.
It suits the smaller APS-C bodies best, such as the Nikon D5600 or the Nikon D7500. For more on buying used gear in general, see Buying used.
Written by Claude from this site's pages.