Argos Ireland have the Canon EF 28-135 IS USM Lens on their website (www.argos.ie) for €289.99.
This is a total bargain, the cheapest I saw it on cam-ireland website was €449. Don't know if it's a mistake or not but I bought one last week from Argos in Tallaght and that's what I paid for it.
It's a great lens, quite light, and the Image Stabilisation makes a great difference when using slower shutter speeds. Very useful lens for all sensor sizes.
But don't tell Argos they made a mistake!