International shipping.
That is the answer 99% of the time. People who use eBay tend to be savvy shoppers. Any consumer good slightly above U.S. retail is a bargain for a foreigner. Only the U.S., Japan and South Korea enjoy truly cheap, high quality consumer goods. We pay a fraction of what the rest of the world does for toys, electronics, furniture, cars, DVDs, etc.
Toys and the like are 20-30% cheaper in the U.S. than Canada, and, globally, Canada is still one of the cheaper consumer goods markets!