Aside from what everybody else mentioned about the worldwide postal treaties (which strongly favor developing nations, including China) this could be done profi

Aside from what everybody else mentioned about the worldwide postal treaties (which strongly favor developing nations, including China) this could be done profitably. It all comes down to profit margin per pound or volume. If it's coming by sea, and with a 5 week delivery - I'd assume it would be, you are really only restrained by volume. Cargo ships can carry hundreds of thousands of tons so volume is often the bottleneck. As for volume, they're packed with 20x8x8 foot shipping containers - that's 1,360 cubic feet. And a cargo ship can hold thousands of these containers, the biggest cargo ships can hold tens of thousands of them. And the operating costs for these ships are not huge. You're looking at a ballpark of a million bucks. Convert that into $/cubic foot and you can see the point. They can make a very near $0 profit per foot, and still show substantial profit. So cheers for economies of scale! If you ever get a chance to see one of these ships in real life, I'd strongly recommend it. These words and numbers mean nothing compared to actually seeing one of these monsters.