Blue Cavern

I was just wandering if shipping from Italy to USA is more expensive than from other European countries.
As an example, for sending a 5 kilograms package of smurf comic books, they quoted me 52 euros for airmail and 26 for groundmail.
What is the cost of a similar package from Germany, France, Belgium, ... to USA?

A parcel 30 x 20 x 4 cm & weighing up to 5kg (about the size I imagine a pile of comic books would be) would cost 32 Euro by land & sea to the US from Germany. I'd hate to guess what it would cost via airmail!!!!!