Not long ago, I purchased a mower-related item on eBay, and the Seller used USPS including a tracking number.
Tracking showed it leaving his city, going to another city in his State, and that"s where it sat for a WEEK!!!
Thinking it had fallen behind a conveyor belt the Seller shipped a replacement.
Days after the replacement arrived, the original item showed up. I refused shipment, forcing USPS to ship it back to him on their dime.
USPS seems to have issues!!!