It sounds to me as though you are selling your home without professional representation. Why else would ask us this question and not your Realtor?
So you need to make some decisions:
Every time you have a question are you going ot post it on Trulia, for people that have no knowledge of the details of your situation? What if (no offense), you don't know enough about real estate to know what to ask...and something goes wrong?
I find it interesting that you say they will list it with a Realtor to sell faster. I am curious if you think it will sell for the price that they need to net out what they need to buy your house. What will happen if another buyer comes along while their home is on the market? Do you have to wait? Can you sell it to the other buyer? What about their deposit?
Nancy, there is a very good reason that 90% of homes are sold with professional representation. If YOU are serious about selling, find competent assistance.