For the past several years, price seems to be the ONLY criteria necessary to assure a timely sale. Your realtor should be expected to prepare a Broker Price Opinion that lets you know the expected sale price of your home. Price opinions are created by careful study of the most recent sales in the area, and then picking several that are very similar to your home. By seeing what similar homes sold for, it is possible to "predict" what a home like yours would be expected to sell for.
If the homeowner decides to stretch things a bit by offering their home at a much higher price, it is likely that the home will not sell if market conditions remain the same.