If he seems a little set-back by our offer ... tell him you are only offering what it worth to you at the time (since you don't really have a use for it). If he doesn't have anyone else interested in it ... and he really wants to unload it ... he will take your offer. Also remember that your time for tearing it down and moving it are worth something too. I'd tell him $400. and you will disassemble it and move it. If he takes it, fine, if not ... you really don't need it anyway.