Seems random who gets screwed in these situations.
Honestly it boggles my mind that USPS can just mark something delivered with no actual evidence of delivery (signature, photograph etc.) and it's just taken as fact.
The buyer listed the radio I had sent him immediately on eBay for way above a reasonable price. I took screenshots and made a police report. Didn't hear anything back in a week. Considered small claims but I'd have to potentially travel to the claimant's area which is a good 3h drive each way at the time.
So the buyer/reseller was in Ipswich which is 15 miles or so from my brother-in-law so he went round there and recovered it for me. My brother-in-law is an ex army (Gulf War vet) 6'5" bouncer. The guy did not argue with him. He was told he could come and collect the broken one at his cost from Bristol. He never did.
I now run a mule account on ebay managed payments and do not accept paypal for anything and do not send anything until cash is cleared from the mule account into my main account.
Edit: also worth pointing out that ebay do not allow sellers to leave negative feedback for buyers so you can't even rate or report the buyer publicly. If you leave any comments in a positive feedback other than sucking dick, they will remove the feedback.