We're raped with tax unfortunately. No more so than with spirits where there's about a 30-35% difference between the prices in Dublin and Newry. Same goes for the price of beer really. I got 8 bottles of Hoegarden in Sainburys for £8 (which is going to be about €9-€10).
Is there anywhere in the "republic" of Ireland that you'd get 8 bottles of something like that for a tener?
Is there a price comparison list for the Porterhouse here vs. the one in London?