The €1.4 million owing in stamp duty would buy four averagely priced Dublin homes. Not that there is anything average about Walford, the Shrewsbury Road pile that has held the questionable honour of being Ireland’s most expensive home for 15 years. Acquired in 2005 for a record €58 million by Carlow born developer Sean Dunne and later put in trust for his wife Gayle Killilea, the Dublin 4 period property was the ultimate Celtic Tiger trophy.  Few buys better epitomise the era. Or what followed. In 2013, the year that Dunne, the so-called “Baron of Ballsbridge”, went bankrupt in Ireland as…