If New York City is any indication, the hot housing market may be cooling. Appraisal firm Miller Samuel reports that the average sales price for an apartment in Manhattan fell almost 13 percent in the third quarter. And the Census Bureau says the backlog of unsold new homes in the U.S. hit its highest point since January 2000 in August. David Gardner talks with Fool Radio Economics Contributor Charlie Wheelan about the slowdown in the housing market.