wELL I THIIS A CARDNIAL SIN TO DO iF YOU PUT THE COILS IN A VISE AND WITH A ZAZA CUT THE TIN OFF THE COILS YOU WILL HAVE COPPER ALUM COILS CLEAN SOME A/C DO NOT HAVE A TIN FRAME SO IF YOU GET YOUR MAGNET OUT CHECK BEFORE CLEANING THEM THE PRICE FOR CLEAN COPPER ALUMINUM COILS IS BETWEEN 1.25 1.75 DEPENDING YOUR REGION ITS LIKE EVERY THING ELESE THE MORE YOU HAVE THE MORE THEY WILL PAY