Remember, don't list with the agent who suggests the highest listing price for your house unless they can back up that price with comparable properties that have sold recently. If you let an agent "buy your listing" you will lose time and probably end-up selling for less than if the house had been priced properly in the first place.
I If some of the agents who look at your house refuse to give you a probable selling price be very wary. They may be trying to see what price you have in mind and will simply list it for that figure whether or not the market justifies the price. Again, these agents are simply trying to "buy your listing" and will ask you to lower the price in a very short amount of time.