I think if subtract 60 days prior when the actually offer was made and look at that specific time frame and think about what was happening in the market at the that time.
There were a lot of articles about rebounds in the market in march of 2007. Remember Feb numbers were not that bad and inventory was shrinking.
Go back to June 2006 and rates were climbing and builders were starting to give incentives and lowering prices. Inventory was high.
Not that these things are that big of a deal, but it could have some affect to sale prices.
My sister bought a home in early 2006 and I still haven’t seen a listing of a comparable property in her area for less then she paid. She also paid a lot less at that time then the current comps or comps from 2005.