Zillow values and Current List Price

[Brian Davis]

I am trying to figure out how to get computer generated homes values together with all of the properties for sale in my current market. I would ideally have a zillow value for every active home from 2 years ago before that zillow value started to drop due to foreclosure activity , market time, or whatever other variables they use to determine the value. This is just another piece of data I would like to compile to better help in identifying potential deals. Anyone have any clue where or how I can get this data without hiring a VA to make this happen house by house? I need a backdoor into computer generated home values somewhere. Thanks...Any help would be so greatly appreciated.