I assume" you are talking about low grade boards that you remove the ic chips, transformers, Al heat sinks, etc. If I assumed correctly, I am able to put them in the shred pile and get about $0.10/lb.

If you are talking about higher grade boards then that's an entirely different thing and the answer is you need to do a lot more reading. If you have higher grade boards then don't depopulate them until you have educated youself by reading a lot more. Mike.