Limits us Canadians from buying on trader if it's an American site too. snicker.
There's some stuff, Stateside, that requires a U.S. Federal government export permit, that only an American can get. And the manufacturer is required to have an expensive Commerce Dept. exporter's licence to export. A lot of whom don't bother with that.
You'd think our respective elected representatives don't want us buying and selling amongst ourselves.