"We currently do not ship internationally", anyone? That message right there, when I'm shopping online, annoys me to no end. Clever way of doing business.
Even more, if they know my address (since I'm a repeat customer and am logged in) and they won't ship some items to me because of my country - is it really too much to ask to mark those items clearly in the item selection? And filter search results based on which items I can actually buy?
Even Amazon currently just says "can't ship to this address" at the very end of checkout. What am I supposed to do at this point of web interface - quickly move to another country and then input the new address?
