I agree with those who have suggested international shipping. If I had to throw out a guess, I'd say that 50% of my ACEOs have gone to the UK, Canada, and Australia.
A lot of people don't ship internationally because they mistakenly believe that's it's a hassle, but it's not. ACEOs are small enough to travel letter post, and do not require a customs form or a trip to the post office. You can buy a postal scale for around $20 at any office supply store, or directly from the USPS web site, then calculate the postage over at USPS dot com.
I'd really give it some thought. As a collector, I find it exciting to get a piece of art in the mail from Bulgaria, or Switzerland, or some other country that I'll probably never get to see. I think you'd see a lot more sales if you were to offer shipping to at least Canada and the UK. I actually find it exciting to know that some of my art is on the opposite side of the globe. Hey, does that make me "internationally collected?" ;)
Kathy
Kathy