I wouldn't salvage caps. You don't know how old they are. ICs are fair game, but unless you've got a analogue delay with an MN3005 (or two) in it, they're not going to be worth much. Some transistors are also worth pulling. But again, you'll be needing an old tonebender/fuzz face or even an old muff to get something interesting out of it. We salvage odds and sods from all sorts. Old video recorders, hifi and the like. If it's useful and easy to get out, generally it's worth doing. But we don't salvage resistors and caps.
As for broken pedals. Fix 'em or break 'em for parts.