Comparison of Carriers

Evaluation USPS FedEx UPS
Cost    https://fitsmallbusiness.com/fedex-vs-ups-vs-usps/ Best    
Care: https://www.popularmechanics.com/technology/reviews/a6284/which-shipping-company-is-kindest-to-your-packages/  Best Worst Medium
    Flipping of packages 12.5 7.0 4.0
    Dropping of packages 0.5 3.1 2.0
Employee satisfaction Government NonUnion Happiest

USPS is best for the sender for low cost.
https://fitsmallbusiness.com/fedex-vs-ups-vs-usps/

But for the receiver, and care of the items sent, Carriers differ in kindness to the electronics
* USPS did the most flipping of packages (12.5 per trip)
* FedEx did the most dropping (3.1 per trip)
https://www.popularmechanics.com/technology/reviews/a6284/which-shipping-company-is-kindest-to-your-packages/ 

This may be because:
*USPS Government employees are difficult to fire
* FedEx workers are non-unionized (except pilots)
* UPS is employee owned and managed