ditto,
USPS wont let you pick it up--and you had a tracking # ??????
In the only way thats not possible is if it had been forwarded to a next station and would have come BACK to Your post office---and YES you do have to be PROACTIVE with the post MASTER sometimes at your branch because the underlings dont care. That said,
Finally --a seller got some protection from ebay for a change-instead of getting screwed which is the way it almost goes.
Yes a US mail tracking # is proof--if seller gets a sign for delivery conformation.
No using US mail is not being a cheapscate---its often what makes a deal or not on ebay---in this enviornment $5 "predatory" over charge will cause the potential buyer to keep browsing.

Another tip for sellers or ebay buyers using a po box----make sure your Name is on the box tag for the dimbulb postal worker---but just as sure --make sure your ebay seller name is also on that tag or stuff will repeatedly get sent back---The postal worker has to because of identity theft/security issues---I got to go check on my 1912 GMC ornament that got forwarded and is coming back. Today

The first yr of gmc trucks was 1912----Happy birthday