FAR ABOVE: Look for saleable scrap metal in trash barrels, dumps, around old barns, on construction sites... anywhere that you can get permission to ""clean up"" an eyesore in return for carting off the recyclable materials that you're after. Old radiators are good examples of saleable cast iron. ABOVE: A wheelbarrow load of scrap aluminum...yellow brass, and No.1 and No. 2 junk copper