You quickly learn to love monitors, TVs, and anything else you can get your hands on. Most TVs take me only 2-3 mins to take apart, pull the boards, wire, yoke, and put cover back on. Then it goes into my "trash" pile. I'm a very part-time scrapper. Most of my metal comes from the old TVs, electronics, and the like that I get from storage units (main hobby). While I don't do trash routes, cold calls, and the like to leave that stuff to the people who do this for real income, I do pick up the odds and ends.

If you don't want to deal with the other metals you can do like I do. Hit the thrift stores and flea markets looking for less then scrap value priced items. You would be amazed at what you can find some weekends. Hit up estate auctions and the like. Few years ago before I got into storage auctions and scrapping I was at an old country store auction. One of the lots was a pile of iron pipe, ceramic pots, fence post, etc. Sold for $50. If I knew then what I know now from these boards I'd of bought the lot.

If really only want to deal with copper hit your local bank and buy a few boxes of pennies. Pull out all the 1981 (82 was a mix year) pennies and toss them in a jug. Wait a few more years when they do away with the penny and it's legal to melt them and turn them in.