Yeah the bulk of what I found was old pots and specially designed selector switches. The construction of the majority of the parts is very robust and serviceable, as well as aesthetically pleasing. The Iso-Tip is one of the gems of the haul, I actually have to go back tomorrow and see if I can find the tips. Also I found a ton of old-school resistors, far better than those chinese Ebay ones that bend into pretzels if you try to breadboard them! Most of the IC's are Op-Amps and voltage regulators, specifically designed for audio applications.