I like putting it into bubble wrap and then into a piece of PVC pipe with caps. Then pack that into a box and ship. It’s virtually indestructible packed like that. May seem like overkill but the animals that work for these shipping companies are truly inventive when it comes to ways to handle packages roughly. The buyer is going to have PayPal protection for his cash if cue is damaged and the seller is on the hook. Trying to collect insurance even if you pay for it is an adventure at best. It’s just worth the extra time and slight expense to save those headaches.