Collect cans on recycle day. 1 lb of aluminum retails between 15 cents and 45 cents, 1 lb of aluminum = 6 soda cans. Crush as many cans as you get and dump into bigass garbage bags, take to local refinery and sell... If you have a pickup go "pick" on trash day for scrap metal... Go for bigass objects such as ovens, boilers, and other heavy metal objects. I've had refigerators and ovens that are worth 75$ each... The only downside to this is you look like a fucking bum. I've done it twice, both times i got a little over 900 on random items, the aluminum cans is gunna take about... 2 trashbags of crushed up cans. about a hour and a half worth of work...