I've had a look at the Golden Pages and it lists these few:
Bygone Days, Arcade Market, Georges St.
The Collector Den, Powerscourt SC
The Collectors Shop, Blackrock Market, Main St
Cultural Collection of Ireland, Fitzwilliam Square
and then a bloke called Mike Kelly with just a phone number.
The one in the Arcade Market is just the little stall mostly selling books, and then with a box of coins, isn't it?
Anyone tell me what the others are like? From their names, they presumably don't specialise in coins and maybe just have a little box full of them. The Cultural Collection of Ireland sounds interesting though. What is that?