Hey Homer, That's a lot for contents insurance alright, I always get quotes from aoninsure.ie who give you quotes from several different companies, you can compare and examine, and also 123.ie I have found quite good.
Does your son have expensive items in the apt? It may be worth it to look at the value of the items he has versus the excess on the policy, e.g. if he has a laptop worth 1,000 but the policy excess is 500 and the premium is x, is it really worth it, would you make a claim for that. Depends, of course, on the value of the items.