We use Priority Mail for our Ebay and Amazon biz too, especially Amazon and their anal “sellers must provide tracking numbers to customers or else” rule.
I had an Ebay package with the usual delivery confirmation that scanned arrival near the end of June as delivered.
It wasn’t and of course the local USPS types were useless. It wasn’t a big or pricey thing, actually it was an old car part to be sacrificed for an idea.
Anyway after I gave up on it, the box finally appeared a few days ago at my UPS Store box.
The previously referenced idea can be seen here with the old speedometer stuff:
I pulled the glass, locked it down in a good vise, hooked a cable and spun it with a drill. I could never top 50, most likely due to the drill.
99% of the time I never have any complaints with what little I deal with USPS.