To many variables to say for sure if you will get $4 out of each one or not. I have seen some degaussing cables that were really thick and then I have seen them so thin that it wasn't worth the effort. Not all degaussing cables are copper either, some are aluminum.
Are there any places in your area that you can take the monitors after you remove the parts you want? Where I'm at I can take them to the county collection site and drop them off no questions asked.