A friend asked me to help him sell his vintage ****yzer, neither of us have any idea what they are worth these days, other than pretty cool looking garage/man cave art. He says it works, but I'm not sure when he used it last. It looks pretty complete, and comes with three metal boxes of tune-up spec sheets. Its been in his heated garage for a few years and looks like its in pretty good shape. Any idea what its worth? This unit has an exhaust gas ****yzer, scope, and comes with all kinds of adapters and connectors, but I'm not sure if it has a manual. I'm going to list in on the local CL and Marketplace soon, if anyone here is interested let me know.