Here is a corking supply and demand story.
They have been called the ghost estates of the Irish Republic – about 300,000 homes built in the frenzy of the property boom that no-one wants to live in now.
How do you price one house on an estate when all all the others are unsold? Zero? Well probably not, but it does represent a challenge.
And 300,000 empty houses in a country with a population of 4 million is a shocking ratio.