The main yard I deal with lists AL as Sheet, Cast, Extrusion, Dirty Extrusion,copper and irony. As long as most plastic and steel is removed you should get $0.40/lb or more for aluminum, except irony. My yard(I really like them) also pays HMS price for my tin because I don't have plastic or other debris mixed in. Develop a good relationship ask the scale person if anything seems off. You will do well once you realize they will help you and want your business although sometimes only after they know you. If you like doing this do it if you don't find something else. Good luck