"This is a response from the Store, who are helping.
Our shipping is based on weight. If you proceed to the checkout and enter your address, the next step after (but BEFORE payment) is the shipping for the weight of your order to the destination. The shipping estimator is not accurate for international shipments, except for Mexico and Canada.
We offer Media Mail as a shipping option, but it is limited by weight and only available for US domestic shipments.
The Flat Rate box is offered when possible but when certain items and or combinations of items are included Flat Rate no longer appears due to the weight and dimensions of said items.
So that is probably something for all internationals to realise?"