I regularly mail packages at the McAlester and Krebs post offices. Here’s what I have observed:
The clerk will quickly weigh my package, affix the stamps, promise me a speedy delivery, and quote me the price.
Stop! Ask questions! The price I have been quoted is likely the most expensive. I have other options.
Readers should tell the clerks to remove those stamps and wait until you have decided the method of shipment.
You have the right to choose.