My van's Service Engine Soon light came on and none of the auto parts stores could/would scan it and my friends were either out of town or didn't have a scanner with them, so I looked for something that would do what I want (I want data, not just codes) and ordered one with a "Want it today?" option. I ordered it before 10AM and it was at my house before 6:30PM, free shipping and a $3.50 discount. I ordered a pair of shoes and a UV flashlight last week and they were here in 2 days, max, with free shipping.
On a related note, I saw that USPS lost $1.3B in the last quarter, but the Postmaster said the package shipping covers their infrastructure, which lets them do other things. Like lose money, apparently.
I wonder if they would still lose money if they raised their flat rate price by 5%.