Kimberly, Check around and try to find some pro plasterers to check it out and give you a bid. It might be worth saving. A lot of people still like plaster walls. Plastering is becoming a lost art and newer people can't do it and just want to drywall over it cause they know how to tape that. Then of course we have the people who can't even tape drywall so they put on paneling. Then there are the destructionists like me who tear it all off, reinsulate, reelectrical, etc., and put on regular drywall and new trim to modernize the house. Just wanted you to keep your options open. Good luck.