If you have the time and the ability to meet with a Super of an apartment complex and let him know what you are trying to do, you can make GOOD inroads, as Apartment complexes are a revolving door for scrap metal. The washers, dryers, & refridgerators are always going. Renovated apartments mean junk scrap and electrical. Take an extra cup of coffee with you and then include a six pack of the Supers choice into the conversation.