I have just moved to Gua and needed a few things from the US so a friend of mine told me about a company that brings virtulally anything from the US to Gua for only $7 per lb of shipping weight.
Basicaly you order anything you want to an address in Miami and then they post it here for $7 per lb which covers the shipping costs from Mia -> Gua and all customs/import charges, then you can go pick it up from San Christobal or Antigua.
Its great because a lot of companies like amazon wont even ship direct to Gua for some reason?
Thought I would share as I have ordered a few things now and its a great service.
Its called 7dollarpost
[moderated : please avoid phone numbers over the forum ]