To the OP, I, like you had been a seller on ebay since the very early days...sold everything from 16mm film prints to arcade items to classic Mustang parts. When I dumped them, I had WELL over 15000 transactions and multiple accounts. The early days (1995-2005) were great-it was so fun buying, selling and making new contacts. Sure, there were some glitches here & there but nothing that could not be worked out within a few emails. NEVER got stung.
Then ebay decided to get greedy. Very greedy. My seller's fee's skyrocketed and continued even more so as time went on. One day, I just up & quit. The best part is I've been able to keep my contacts and I sell directly to them now.
Ebay will get what they deserve-it'll take some time, but it will happen.

Well, now *possibly* the onus will be on USPS if they did indeed deliver it and the deal goes sour... you paid for a service that they accepted your money for...they didn't follow up so you should be ok..hopefully. Please let us know how you make out & best of luck on this!

It sure as hell doesn't seem to be a term that a 69 y/o man would be using......