I was at a plant today and was ask by someone looking to buy the building what the going price would be on some of the compressors that he wants to remove..Compressors range from RWF II 399B, RWF II 222H, RWB II 399, RDB II 399, RWB II 134. all the RWF's have LX panels with VFD control and only a years run time on them. The RWB's and RDB's are older of course. I have never bought a used compressor so really have no idea what the worth should be. Any help would be great and Thank you in advance.