Houses that are overpriced remain on the market and the listing becomes old and stale.
Houses that are overpriced waste Realtors time and Realtors don't show those homes unless it is to help sell another listing.
Houses that are overpriced indicate that the seller is not truely committed to the process.
Houses that are overpriced generally don't sell.
Ask your realtor for a CMA on your home. This will indicate the value of your property relative to other similar properties that are both on the market and already sold. Armed with this information you are ready to position your property on the market and test the market successfully.