I assume what you are talking of is a belt driven circular saw sawmill? If so, value depends on what has not been broken/bent/twisted due to the building going down on top of it. Also how much of it is there. Are the log dogs there, is it ratchet style handle with increments so you know per pull of the handle what amount you are moving the log past the blade (for thickness of each board). I just saw one on CL that had its own diesel engine and was on a track that had the ability to put an axle under it and tow it. $4,000.00 was their asking price. It was a complete unit ready to use.
God and family, the rest is icing on the cake.
I'm so far behind, I think I'm in first place.
Premier Bovine Scatologist
Host of the 2015 FAMILY WOODWORKING GATHERING