How long will real estate go?

The sellers market is closing up shop due to the decrease in home values. Home sales have plunged about four percent. Lawrence Yun believes that " the decline will be short-lived and should turn back around in the spring of 2007". However, other economists aren't so optimist. The believed reason behind this decline is due to the disconnect between buyers and sellers. Sellers aren't willing to cut prices, while on the hand, sellers aren't willing to hand over a larger amount of money. Real estate has always been big on location, and what is going on in the Southeastern part of the country maybe different than what is going on in the mid-west. So how can the this buyer and seller market change?