Careful, double box, smart and required for insurance,
I would buy insurance, doesn’t cost that much. keep in mind, any insurance claim will be by you as you arrange for/pay for the insurance, not the buyer (even though the buyer pays you), and a claim is both confusing and takes time, and will depend on the buyer’s photos of the damaged box as received, unopened, and the damaged goods. Then buyer has shipper pick it up and shipper will asses the damage. It has to be done right to be successful.
If you don’t have confidence, UPS has a ’pack and ship’ service. (check online see which locations offer it).
Call them, give them the size and weight of your item, and a zip code middle distance from you. They will give you an estimate close to the final price.
Then, in your ad, state local pick-up preferred, and that the UPS ’pack and ship’ estimate to ___ zip code.
Then the buyer (not you) makes arrangement with their local UPS, pays for it directly, and UPS is responsible for it, buyer deals with any problem. (you can tell them the UPS closest ’pack and ship’ location to them) You simply drop it off at your UPS in their name, unpacked, walk away.
I have bought two sets of speakers, and had a third item (my mother’s childhood croquet set) using/paying for UPS pack and ship, excellent results.
This is a good way to buy something you really want when the buyer says local pickup only.
byw: local pickup: I offer to meet buyer anywhere up to 1 hour away, thus your area of buyers is essentially a circle of two hours.