You asked
Is the nikon z50 worth buying used?
I think the Z50 is a good used buy. It was announced in 2019, and the buying used guide makes the case that a body a generation or two old is often most of the camera for a fraction of the price. If you're weighing it against the newer Nikon Z50 II, the used original is the cheaper route to the same 20.9-megapixel APS-C sensor.
Two things to check. The Z50 has no stabilisation in the body, so pick a stabilised lens for slow shutter speeds, such as the Nikon Z DX 16-50mm f/3.5-6.3 VR or the Nikon Z DX 18-140mm f/3.5-6.3 VR. Also budget for a new genuine battery, because old ones lose capacity.
Written by Claude from this site's pages.