Well, despite the fact that Amazon still can't organise themselves to allow Irish customers to buy from the Toys section, you can buy from "marketplace" retailers that they host.
I just ordered City Corner and Drawbridge Defense for combined total incl. postage of €80 approx. compared to €100 excl. shipping on Lego S@H (Ireland). Mind you I think Smyths Toys will likely have the same prices (e.g. City Corner for €50 instead of the €60 of S@H) as they seem to have new sets cheaper than S@H recently.
Still, just a heads up.