@Mark McWilliams - I think Miroslav's point is that it does not cost that much more to ship a magazine from the USA to Canada (or anywhere for that matter). Someone is profiting immensely from that hike in price to other countries.

Based on Ron's comment, I assume there is some strange American law which prevents shipping outside of the USA for a reasonable rate. But that seems kinda ludicrous since it's basically hurting American exports, so it really doesn't sound right at all to me. It would explain why buying anything on eBay from Americans is basically out of the question though. They rarely ship anything outside their own country and when they do it normally has some dementedly high shipping cost.