The worst case scenario for a seller is to keep lowering their price until the house is stigmitized and the buyers smell blood and go for the kill.
In today's troubled housing market the way to avoid this situation is to put your on the market with the RIGHT PRICE and when it does not sell quickly, cut the price hard and fast so there are no incremental adjustments.
Of course the sellers do not want to hear this advice. They will rather price it aggressively and hope and pray that a buyer sees this and snaps it up.
"Testing the market" is NOT a strategy in this depressed market; since homes sales are down and buyers are on the hunt for good deals.
Buyers in todays market are looking at every angle with much more detail and try to find a way to get a lower price than what is out there.
So for all the sellers are out there on the market or considering to put their house on the market heed what your REALTOR says. After all you hired a professional to do the job right the first time out.