Dan,
For sure, it is a good idea to visit your local post office at the destination. I sent a valuable Ross 4 to New York, an easy run from Northern VA. The recipient was from another country and had arranged delivery. However, he was staying at an AirBnB, and did not know the apartment number. The carrier reasonably noted the item as undeliverable. Tracking was useless, and we expected the item returned to sender. It was eventually, about six weeks later, returned. All along, it was at the PO, and could have been picked up right away.
A fact which did not come out, as the buyer did eventually get the goods: If the carrier makes a delivery attempt, eBay rules that as seller gets paid. Same if USPS notes "delivered." In that respect, "porch pirates" are stealing from the recipient, not the shipper.
Peter