I think home prices may fall by even more than 30%. We're hitting a period of deflation, which will drive wages (and employment) even lower and the value of houses may drop even more:

As painful as the decline has been, history suggests home values still may have a long way to drop and may take decades to return to the heights of 2½ years ago.

"We will never see these prices again in our lifetime, when you adjust for inflation," says Peter Schiff, president of investment firm Euro Pacific Capital of Darien, Conn. "These were lifetime peaks."

The boom in home prices — fueled by heavily leveraged loans built on low or even no down payments — made it easy to forget that housing values had been remarkably stable for a half-century after World War II, rising at roughly the same pace as income and inflation. Prices soared in most of the country — especially in Arizona, California, Florida and Nevada and metro areas of Washington, D.C., and New York — during a brief period of easy lending, especially from 2002 to 2006. That era's over.

So far, home values nationally have tumbled an average of 19% from their peak. As bad as that is, prices would need to fall as least 17% more to reach their traditional relationship to household income, according to a USA TODAY analysis of home prices since 1950. In that scenario, a $300,000 house in 2006 could be worth about $200,000 when real estate prices hit bottom.