Real estate agent Maurice Dolan places an open house sign in front of a home for sale on July 30, 2013 in San Francisco, California.  According to the S&P/Case Shiller composite index survey of 20 metropolitan areas, home prices increased 2.4 percent in May, their highest level since 2006. San Francisco home prices skyrocketed 24.5 percent. Photo: Justin Sullivan, Getty Images
{}