Sorry about the loss of your sister, being a trustee can be a very difficult proess.
Like many other people have said, looking at the property can give a much more accurate price evaluation. Using my title company, I looked up your property and was given a median market value of $165,000. A home is really only worth what someone else is willing o pay for it. When I started to look at the other homes in the area that have been selling, I found that the average price per square foot is between $180-$200. Using this model we are given a more accuratelook at what the house could sell for, somewhere between 125,000 to 140,000 is a great place to start. If you are interested in a more in depth look at what to price the home at I would love to volunteer my services to you. Please let me know if you have any further needs or questions.