I sold my M400 about a year ago for $4000. It was completely rebuilt by Jerry Korb. After the rebuild, I replaced the drive belt and all the pinch rollers. I can positively guarantee that it was as good as a new machine. It was difficult to find a buyer even at that price. This guy obviously has no idea what goes into a top dollar Mellotron. I think it would be crazy to pay what he's asking for a machine that's in questionable shape.
Bernie
Bernie