Tracking market performance- data sources?

[Pete Perez]

Hello BP!

As I am moving along in my education on RE I am starting to see a major need to track local market performance. I want to track monthly data such as: Foreclosure sales, Existing Homes Sales, New Home Building Permits, and Mortgage Loan Defaults. I am sure most of you are aware of the method I am referring to. I don't know where the source of the data would come from though?

I know car.org has nice historical data sets for home prices, but that isn't necessarily what I am looking for. They also have year over year percent changes, which is ultimately what I'd like to calculate myself. Does anyone know of any source, or paid service that I can subscribe to so I can track this data monthly? 

Thanks in advance,

Pete