Location
It would help to know what area you are in.
Also, give this a quick look over. Its a little old, but worth a 5 min read.
http://ecmweb.com/mag/electric_maximizing_value_scrap/
I'm due to replace a load of patch leads in my server room. With copper prices the way they are, and people stealing signal cable from the railways etc., is there any value in these that can be recovered? What is the least troublesome - and legal - way to go about it if there is?