Midwestern Members - Catalytic Converter Recycling

Does anyone know of a good place near Joliet, IL that buys used converters for a good price? There just sitting in my garage, figured I could get some money for them.

these guys have 4 locs. in Ill. they gave me 66 a piece for my cats. 12 for the pups. http://www.altermetalrecycling.com/