I wasn't sure where to post this but I'll try here first. I recently ran accross a Tektronix 465 DM40 with the manuels and the packet on top of the 465. It's in good condition although I couldn't tell you if it works 100%, I believe there is nothing wrong with it. It was passed down from my brothers inlaws whom owned a electronics repair shop for years. I would like to know if these units are used today and if it has any value? If so does it need to be calibrated? How much does that cost? What and how would I go about selling this? Should it be refurbished, recalibrated, or at least checked out? Or sell it as is if it has value? Thanks for any info at all.