Hi there. I don't see why and what kind of extra international shipping fee ebay would add. I've shipped to the US before, and I've never had any complaints. Of course, they were always small packages.
I have asked around about possible extra fees on international shipping, but the only information on extra "hidden" charges I got was from people around here who bought from US based sellers; nothing about extra fees when it's the other way around. I have had one experience (as a buyer) where I had to pay extra for the package I had bought from the US. Those extra charges were custom fees, but not really an added ebay fee.
US based buyers on this board can share their experiences, I'm sure.