I hate to bring bad news to our folks in the USA but your government have recently increased the charges for handling international mail! There are now VERY SIGNIFICANT charges for postal services originating outside the USA and delivered to the 50 states.
We have swallowed these increases on all current orders (about 50% increase on what was originally charged) but cannot do this on any future orders.
I was just at the Post Office sending out current orders and had to be picked off the floor when I received the bill!!!
Needed several pints of ale to sort out my blood pressure