Advantages to shipping online with USPS?

Question

What are ALL the advantages to shipping online with USPS compared to bringing the package to the post office. Here's all i have so far:

-Express Mail- 3% off the retail price

-Priority Mail- 11% off the retail price

-Priority Mail: FREE electronic delivery confirmation and a reduced fee for signature confirmation

I cant find anything else, anywher and i know there is more...Also can you tell me international benefits too?

Thanks

Answer 1

If you are sending abroad, they will take care of the duties.