I have a chance to name my price for a used Dutchwest 2184 along with all the pipe/flue. Not sure how old it is. It is being sold by a friend of a friend. I am planning to put in in my 1st floor family/dining room/kitchen area, which totals 625 sq.ft. I already have a Buck 91 in the fireplace upstairs in the split level that THOROUGHLY heats that room and all the bedrooms. Should I buy it and for how much? Thanks.