I think I misunderstood the question. I was taking it as as each being separate - electric motors, coils of copper wire and those transformers like on telephone lines. If you're talking about the copper in electric motors, then I'd agree with tristatescrap - not worth the effort. I did the "taking apart motors and alternators" thing when I started. Many hours of work to separate the copper wiring (some actually use aluminum wiring) and clean the cast aluminum for about $100 from maybe 100 alternators/starters. Time better spent finding new markets.