For comparisons why don't we all quote prices in similar units and currency, as original poster was Irish I suggest we use litres and euro.
Currency convertor here.
http://www.xe.com/ucc/
Unit convertor here.
http://www.digitaldutch.com/unitconverter/volume.htm
I'll start
City country. Price Euro. Litre amount. Date
Cork,Ireland. 1.54 1. 11/02/12