BOSTON ( MainStreet) -- Are you ready for some football? Last weekend's NFL conference championships shone a light on four U.S. cities that certainly are. "This is definitely a fan town," says Susan Myszkowski of the Greater Baltimore Board of Realtors, where everyone had been hoping the Ravens would beat the New England Patriots on Sunday to advance to Super Bowl XLVI (they didn't). Here's a look at the housing markets of Baltimore, Boston, New York and San Francisco -- the four communities whose teams played in this past weekend's conference championships. Price ranges are for homes within 20 miles of each city's borders and exclude mobile homes, abandoned properties and open land.