Gerry, I think you could advice Weerasak to offer different shipping solutions also.
For example he may consider registering with DHL and offering a shipping with them.
A 0.5kgs small size shipment which probably fits a few MB2 or UB1 boards could be shipped to the USA for about 19-22Euros depending on the location and the delivery time is 1-3days only with very detailed tracking.
The post office takes a similar package for only a few Euros cheaper, in the 16-19 Euros range and that can take upto 4 weeks to get delivered even if it is marked with priority option and there is only very basic tracking informations available.