Depends on where it is in the Estate. Parts of St. John's are lovely and the parts nearer Green Park are not quite as nice.
I know somebody who sold their Bungalow last year, he was very near to Corkagh Park as there was a lot of messers hanging round in the evening.
€345 is expensive enough for a bungalow if its 2 bed. Depends in what condition, I suppose. A friend of mine looked at a 2 bed house in St. Johns Close recently. It had come onto the market at €330K and there was an offer in of €336 and I think they got near the €340 for it in the end. This was absolutely immaculate and had been totally refurbished and had a beautiful conservatory. My friend did not buy because the 2 houses directly beside it looked rented and were very unkempt.