Why not FedEx or UPS?
I just happen to own a small shipping franchise called GoinPostal. We ship through all of the services including USPS. Of all of the services USPS is the most difficult to deal with on a daily basis. You would not have this problem with UPS OR FedEx. We send 75% of our stuff through FedEx. They are the best with insurance claims for us. As far as price goes USPS is the cheapest for small boxes but is outrageously high on larger or heavier packages.
If one ships to any home address, anywhere, the most you can recover for a “lost/damaged/misdirected package” is $100.00 (UPS) if you don't buy additional shipping insurance.
Business addresses fair a little better, but not much against non tracked packages sent via USPS.
I actually had some “fun” when the USPS claimed they “delivered” a package, supposedly shipped via FEDEX, to a closed, gated, camera monitored business on a Saturday.
If shipping to any residence, pay the extra $2-12 dollar fee or adult signature receipt required, signature proof of delivery, and declared value insurance, or just roll the dice!
Consider it a mandatory Union employee tip!
Professional business insider tip- Always pay for the extra “Declared Value Insurance”, when shipping packages to places like Miami and Chicago.
Because USPS is less expensive and generally works very well.
The buyer can give his zip code and postage will be computed precisely and the seller has this info on the transaction record. The shipping label is automatically printed with all correct particulars including postage.
It is a fantastic system that works very well.