Carol, agreed... I'm thinking more of situations where company X (or an individual, as in an ebay seller perhaps) simply isn't geared up to shipping overseas for their own reasons.
In the case I was actually considering myself, the item is available for sale in Australia at approx 3 times the usa price and that's like a red rag to a bull for me. My moral point of view: if I'm allowed to go to the usa phsically and purchase, they ought let me purchase by letter/fax/phonecall/internet/intermediary. Hmmm... what if I emailed them a purchase request using an american accent?