This assumes your time is free. The used market has tons of friction.

I try to buy higher quality things, used if possible, and sell when I’m done with them. But this is primarily for ecological reasons. The complete cycle can be pretty annoying/time-consuming to the point that it’s probably economically a small loss.

Buy-side can take a lot of trawling FB/Craigslist to find an item that hasn’t been thrashed. Plus coordinating pickup time/location. This usually requires driving somewhere I wasn’t planning on going.

Sell-side you have to deal with all the flakes and ghosts, not to mention the people who will show up hours late. Giving away the thing instead seems to counterintuitively make the flake problem even worse.

If you buy and sell online the platform and shipping fees are 15-20% of item value.