In a rapidly changing market it might actually help to do range pricing. For example, when prices were skyrocketing with little inventory it was difficult to accurately determine within less than 10% what your house would sell for.
We sold ours using a pricing range in 2005. It was on the market for about 3 weeks with about 3 dozen showings and sold at about 60% above the min 40% below the max range.
AT the time there were virtually no houses on the market within +/- 100K in the neighborhood.
Similarly in the current market, with credit drying up and price declines beginning to accelerate, it is difficult to establish what a house might sell for. There is now way to predict the actual sale price of a house to within 5% anyway. To me it is simply admitting that there is variability and uncertainty in the market.