That you are seeing different things in different Zipcodes makes perfect sense. People behave differently depending upon their demographic and economic situation. And those behaviors have a tendency to follow along the lines of Zipcodes (not a perfect science, but a fairly predictable art…)
The take away is that while business might be fairly active, you are seeing 2004-ish prices and hence any 2006, and 2005 level increases are being or have been eroded.
This is all good information to have and track as some of us look for a good entry point for a home in the years to come.