I would finish it out if that is an option. Buyers in that price range and area are not looking for the headaches of an incomplete house. Without alot of information, that is the best I can do.
Also - where is the agent advertising? A house like that should have a national or at least regional (all of SE US) audience, as a likely buyer could be looking for a vacation home. The agent stands to make well over $30K, I assume. Adequate advertising is their responsibility, so make sure it is happening and on an appropriate level.
How long has it been on the market? What are the average days on market for that area? For that size/priced home in the area? That will help you to know if your expecations are reasonable, or if you may need more aggressive representation. If your agent hasn't already provided you with that kind of information, they should. If you do not live in the area, you will likely need to stay on top of the agent. It's all too easy for agents to neglect absentee owners.
I am sorry you lost your dad, and know how hard it can be to get everything in order. I wish I had the bucks! That is one of my favorite areas to vacation. I bet it is heaven. Good luck!