You asked
Is the samyang af 24 60mm f 2 8 fe worth buying used?
I'd say yes, it's a good candidate for used. The buying used guide makes the case that cameras and lenses are built to last, so a secondhand copy often gives you most of the gear for less money. This is a light f/2.8 standard zoom under 500 grams, and it covers 24-60mm on full frame. On an APS-C Sony E body it frames like 36-90mm.
Keep in mind it isn't stabilised, so it leans on good light or a fast shutter speed. It fits a long list of Sony E bodies, from the Sony a7 to the Sony a6000, so check your camera's page before you buy.
Written by Claude from this site's pages.