going to sperlings directly seems to yield better info, it breaks it down by zip code, gives some historical info and tells you the percentage drop in median from the prior year, unfortunately it doesn’t go further, you can get specific property history elsewhere. I do like sperlings data on the housing stock, you can pick specific tabs on the zip code results and under housing it has vacancy rates, ownership rates and a percentage break down of when the houses were built within that zip. Some of the other data is weak, surf at your own risk.