There is a maintenance shop on the airport that has a very good reputation. I've not used them personally but the NH Wing of the CAP flies their airplanes down to him for maintenance.
http://fitchburgairport.com/fbos/Even if you don't have them do the pre-buy, they likely know the airplane and could tell you about it.
Like Ron said, there are several of us who are within a short flight of the Fitchburg Airport and we could go kick some tires for you if you like. Maybe turn it into an Outkast gathering - We don't need much of an excuse to fly and meet up somewhere
