A friend asked me to help him sell his vintage analyzer, 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 analyzer, 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.