Real Estate Market Index Data 

The RDC Market Area Update Report
RDC provides up to date real estate market data right from the source.  Its 250 Real Estate Relocation Professionals generate quarterly statistics on median sales prices, active listings, days on market, absorption rates, and local economic conditions.  Real estate market conditions vary from state to state and neighborhood to neighborhood.  To gain insight into regional market trends, click here.
Bankrate, Inc. is the Web's leading aggregator of financial rate information. Bankrate continually surveys approximately 4,800 financial institutions in all 50 states in order to provide clear, objective, and unbiased rates to consumers.

S&P/Case-Shiller Home Price Indexes
Trend and forecast data for 20 MSAs and 10-city and 20-city composite home price index. 

Federal Housing Finance Agency
Find information on housing price appreciation on the OFHEO website. OFTHEO promotes housing and a strong national housing finance system by ensuring the safety and soundness of Fannie Mae (Federal National Mortgage Association) and Freddie Mac (Federal Home Loan Mortgage Corporation).