In general though, a 3 bedroom house is worth a lot more than a 3 bedroom apartment. In Ireland, a lot of people have a long term aim to live in a house and consider an apartment a starter home only ( I know this is a sweeping generalisation, but there is some truth in it).
The resale value of a house would be higher in the long run.
According to an article in the Irish Times, last Friday, as banks are now much more conservative in their lending policies, they are much happier lending for houses than apartments, as they consider the long term prospects for house prices to be better than apartments.
But, its very much up to you. How long to you intend living there. I know you can't predict the future, but think about what you want from this home ( don't forget its not an apartment or a house that you are buying, but a home).
Do you think that you will get sick of living in an apartment in a few years and want to move to a house ?
Is it a location that you intend staying in, or a starter home that you want to move on from quickly when you can afford to trade up ?
But, as others have said, if there are unsold units in the development, start low and see if you can get a good discount off the asking price