Not all homes are for sale, sell! The biggest reason for homes not selling is of course the Price. If you list the house over market value, if will not sell. The second biggest reason homes don't sell is because the seller is not motivated to sell. We can bring him a great offer with great terms, but he may not.
So here is a chart that shows what happened to homes in the last 4-5 months, October 11-March 2012: