jwolthuis - 3:18 pm on Jun 8, 2011 (gmt 0)

Don't forget it costs almost as much to ship 25 lbs vs 2 lbs and..

Not true. I ship 2 lb packages, and 25 lb packages, and the shipping costs are not even close to being the same.

The exception might be with flat-rate boxes, but I've yet to fit 25 lbs in one of their cheap boxes, and have it arrive without busting open.

...the USPS is losing money.

Agreed. But due more to business lost to online bill-pay than the cost of their package services.