SK-1 Modular builder’s purchases

I just love snooping on previously bought items of certain eBay sellers. For instance the SK-1 builder has purchased his SK-1 for $30.99, however one certain item is surelly to be found wherever cool circuitry exhists, Forest Mims Engeneer’s Handbook!!!! Other parts spotted include large quantaties of knobs, switches, and other vintage cases. Looking forward to some crazy gadgets from the same seller soon.