You asked
Is the samyang af 24 70mm f 2 8 fe worth buying used?
Yes, I'd consider it. The buying used guide makes the case: lenses last a long time, and buying used is one of the easiest ways to afford good gear. The Samyang 24-70mm f/2.8 FE is a Sony E-mount full frame zoom with autofocus and no stabilisation, so the main things to check on a used copy are its condition and whether the seller has tested the autofocus. It fits a wide range of Sony bodies, from the a7 to the a7R V, and works on APS-C bodies too, where it frames like 36-105mm. If you're shooting APS-C, that's worth knowing before you buy. For a quick overview of how to pick between options, see your first camera.
Written by Claude from this site's pages.