Rob,
You sound like a very intelligent man. You know very well, that in this market any offer that even comes close to braking even should be snapped up as fast as possible. Your X seems unaware that it is a buyers market and there are plenty of homes for sale that are far undervalued. You really need to do the rational thing here. Maybe you have become so used to trying to please and appease XW that you just do it out of habit. This time , think of yourself. It is sad, that XW has kept you prisoner in that house , while she lived where and with whom she wanted. The fcat she can keep up this acrimony is proof she still has many deep feelings for you, maybe negative, but feelings. Remember, she cheated on you, divorced you and took your child. Why would you think she would do anything other then be hurtful now. She seems to know no other way, even when it defies reason. Stick to your guns!