Assuming everything here has been done legitimately, I wouldn't scrap it. I'd take it by sever electricians and ask what they would be willing to pay for it. If that didn't pan out. I would cut it into 4 or 5 foot lengths and throw in 50 or 60 pounds every time I went to the yard. The best thing to do is, like everyone else has said, ask the owner of the company to sign a piece of company letterhead stating that he gave you this wire. Very few scrap yards around here will give you any trouble with proof like that.