Where do used UPS delivery vans go when they are retired ? Contractors & food trucks often use FedEx vans  for another 100,000 miles. Another thing that you never see is a second hand armored car, (except for Law Enforcement) but that is kind of self explanatory.

UPS package cars and road tractors are destroyed when the fleet maintenance team determines that they have reached their useful life.
Package cars get rebuilt many times before being crushed or destroyed.  Road tractors, at the end of the line, usually have both frame rails cut right behind the cab.
There is a restored UPS Mack F model at the Mack Truck Historical Museum.
I know two UPS road tractors that didn't get destroyed once out of the UPS system but that is a different story.

Reason for all this is liability, lawsuits and lawyers.

Jim

      All brands of turbochargers professionally rewound and synchronized.
                                         ------------------------
               This is sketchy even by my standards...   Uncle Tony
                                          ----------------------
                         If you can't outrun them, outfox them.

Thanks