I haven't been able to figure out why electronics can't be shipped internationally through Amazon either. The closest guess I can make has to do with FCC, and other countries' equivalent, requirements and interference. For example 802.11 uses different bands depending on what country it's licensed in. US is channels 1-12, but France for example goes 1-14.

I figure the OEM nor Amazon wants to indemnify the device from causing interference in countries it's not designed to work in. On the other hand I have no problem buying whatever the hell I want from some chinese stores.