For me it's both. I go through all of the extra time, effort and money to ship internationally... only to get screwed when someone says they didn't get it. This unfortunately creates two problems: 1. For low cost items, the cost of shipping internationally isn't worth it since the shipping will likely be as much or more than the cost of the item itself and 2. For high priced items the risk of someone screwing you by say they didn't get it is to great, most people can't afford to take that risk and lose that much money. I used to ship internationally, but after the third time of getting screwed for some pretty high priced items, I was done. It's just not worth it for sellers.