I've just been advised that Ancestry also has a money-off saving on its DNA test for Irish residents who want to pay in Euros, rather than Sterling, thereby avoiding currency exchange and other greedy bank charges. The Ireland offer reduces the price from the standard €95 to €70. Shipping costs are additional. See the AncestryDNA Ireland page for details.
For convenience and price comparison, you'll find all the current offers on the Special Offers page of my website, Irish Genealogy Toolkit.