Scrap metal prices are sometimes surprising to folks. The value of junk can really make a difference in projects and the bottom line. The real "scrappers" don't want people to know how much scrap metal is worth since you are effectively bypassing the middle man if you would throw it out. The scrappers will get the dividend picking through the trash at the tipping floor. Information is power, or in this case information is beer money.
RecycleNet Scrap Metals Index - Online Market Prices