First I would read the contract, then talk to the listing agent about reducing the price if possible. For a home not to sell in this market it could be the price, location, or just wrong marketing. Is the listing actually active right now. Usually you list for 6 months then do an extension. Have you done an extension of the listing? Even the worst of homes get offers when there is no inventory. You need to do your homework and really have a good sit down and strive to take it off the market. It could be they will let you out of the contract but have them do the comps again and see if it is being marketed at market value.