25fbba02_rts_and_Sources___OpenCircuits__Comments
[What] Headers and Jumpers [Where] Computer mother boards. Computer expansion cards Some stores may carry massive bags cheaply so this may not be an interesting target. [Comments] 
Useful as headers or to adapt parts to prototyping boards. You can also often find cables with plugs that plug into the headers very nicely. Also true of RC hobby servos.
Salvage Parts and Sources - OpenCircuits
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