Irish property was not advertised abroad for one simple reason: where would you advertise? In the late 90's, as Joe sez above 'people here in the late 90s did not believe ireland would be the next ireland.'. Where would you find some Frenchman, German, English even who would ever come to ireland to buy property? and island cut off from the rest of the continent. These people (particularily the Italians), don't even buy THEIR OWN property! they rent.
Remember we were/are the only country in the EU (perhaps the world) during the same period (90's-now) where the entire country is now cash rich, and we needed to do something with all the cash; so we bought more property here, and we bought more abroad.
we're not buying property because we are all propery experts; we buy it because we have a wad burning a hole in our pockets, and having a property portfolio was the dish du jour!
Very few of us were ever even a landlord in our own country, let alone the far reaches of turkey, or china, or wherever.
Most places are still appreciating, so we are all still making money, but its by pure luck in 99% of the cases!