You asked
Is the sony a6700 worth buying used?
Yes, I think the a6700 is worth buying used, if you can find a good one. It's Sony's best APS-C body: stabilised, with subject-detection autofocus and a proper grip. The catch is that it was announced in 2023, so it isn't an old model yet. Used savings are real, but you won't get the same "one generation back" bargain you would with an older body. I don't have current prices, so compare what sellers are asking against new.
Whatever you buy, budget for a new genuine battery. Old ones lose capacity fast. For a kit lens, the Sony E 18-55mm f/3.5-5.6 OSS is a sensible everyday partner. More on saving money is in buying used.
Written by Claude from this site's pages.