Sales of repossessed properties were on average done at prices 71.5% lower than where the houses were originally valued. That means the average price for a house that was originally sold for €100,000 in say, 2006, repossessed and then sold during the first half of 2013, would have brought a price of €28,500.
Source: Spain faces staggering losses as it accepts the reality of the housing bust — Quartz