BSU --
I was going to ask whether you signed a joint representation agreement, which it appears you did. In the future, do not ever do this. Two parties interests can NEVER be equally represented by one person.
Secondly, in reading the portion of the contract you entered, you are entitled to $100 per day liquidated damages until possession is delivered to you. That's it. Legally, that's what you are entitled to. Yes, you can sue and you have all your legal rights. The problem is that they know the hassle of you doing anything beyond bitching at them is highly unlikely. The penalties in the contract are insufficient enough to motivate them to get out before they feel like it. Just make sure you get the liquidated damages. Other than that, from what you've indicated, that's pretty much all you have. In the future have a lawyer look it over for a couple hundred bucks to ensure that you understand all your legal rights. Good luck to you.