I would agree with Ravima. I buy items from the US and resell for my business. By the time I ship them to Ireland, pay insurance and vat/duty on the items I need to sell them at 1.5 times the US cost to make a profit.
I looked at what you are doing and could not make it viable. There are places like dollardays.com but I think you would find it difficult to compete with US sellers even allowing for shipping
I did see a piece in the paper recently about the Revenue clamping down on "professional sellers" on eBay.
Not people with businesses who use it as a separate conduit...people for whom it's a lucrative sideline. On a personal level I'd love to see Revenue go after ticket touts. It would be easy, profitable and do humanity as a whole a great service! Rant over