You asked
Is the nikon d3300 worth buying used?
Yes, I think the Nikon D3300 is worth buying used, as long as you know what you're getting. It's a 2014 entry DSLR with a 24.2-megapixel APS-C sensor, and it's cheap on the used market. It has no in-body stabilisation, so pick stabilised lenses for slow shutter speeds. For an everyday kit, I'd go with the Nikon AF-S DX 18-55mm f/3.5-5.6G VR II, or the Nikon AF-S DX 18-140mm f/3.5-5.6G ED VR if you want more reach. Budget for a new genuine battery, because old ones lose capacity. More on that in buying used, and the full details are on the Nikon D3300 page.
Written by Claude from this site's pages.