Remote controlled cars/trucks for motors and power transistors.
Printers for stepper motors.
Electronics from the 70's, 80's, and 90's will have more harvestable through-hole parts and fewer custom chips and surface-mount parts.
A few $ more might... be an old oscilloscope. An adjustable power-supply from 0-30 volts with a bit of power is also something that's pretty universal.
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