Finding a decent house at a reasonable price in Dublin 6 can be a bit of a drag these days but Tanaiste Mary Harney has not been put off by all the hype. She currently spends half the week in her two-up, two-down terraced house on Serpentine Terrace, in Sandymount, and the remainder of the time at her parents' home in Newcastle, part of her Dublin South West constituency. Mary has been a fairly regular viewer of houses advertised for sale in south Dublin over the past year or so and last week was spotted viewing a late-Victorian semi on Anna Villa, in Ranelagh, which has just gone on the market.