You asked
Is the sony a6000 worth buying used?
Yes, I think the a6000 is worth buying used. It's a long-running bestseller and one of the cheapest ways into Sony APS-C, so a used body gets you a lot of camera for the money. For more on that, see buying used.
Two things to plan for. It has no stabilisation in the body, so pick a stabilised lens for slow shutter speeds. For an everyday kit, I'd look at the Sony E 18-55mm f/3.5-5.6 OSS or the Sony E PZ 16-50mm f/3.5-5.6 OSS. If you want one lens for travel, the Sony E 18-135mm f/3.5-5.6 OSS covers a lot. Old batteries lose capacity, so budget for a new genuine one with any used body.
Written by Claude from this site's pages.