I guess I won't help much since I'm a bit different case... but anyway...
It's really difficult to find ANYthing suitable for a quaker here, talking about food (pellets, treats and such), petshops only have seed mixes, toys (I mean good and suitable toys), so I buy most of these things through eBay. But it gets really annoying when I find a great toy and then I find out that the person is not willing to ship worldwide or they would ship worldwide but the shipping would be like 30USD (and the toy costs 8USD)... when I know it's not that expensive at all, because I had other things shipped for half the price or less.
And there are many online shops who for some reason I don't understand wouldn't ship worldwide and that is a real shame for both sides I believe, I don't get the things and they don't get the money...
So if you think about starting an online shop, please consider us, overseas people who might be interested as well and ship worldwide and have a paypal account ready
One more thing with the paypal, don't insist on people using only their verified mailing address as for example here, you cannot verify it since the banks don't cooperate with paypal. So this is another thing that makes my shopping online difficult...
And now I've just realised what I would appreciate in an online shop - have some sort of online advice centre, that helps me decide what I really want to buy quickly and so I buy it. Otherwise if I had to wait for an email I may well change my mind if I really NEED that