Here a thing i started doing. If you know or see guys that pick up garbage / scrap metal and stuff like that so they can re-the junk for money.
chances are these guys have seen drums just sitting there , what i do i be friend them and give them my contact number just incase they make a find , and i let them know that they can make more money with me rather than draging a few pieces of metal to the scap for change , you can get a great deal this way . be kind with these guy's and be fair and they will have an incentive to look harder for you . just my tip , for you guy's and it works