If you have just a few washing machines then you won't make much money but if you can score truckloads of washing machines then you can make some good money.
Post an advertisement on craigslist for free scrap metal and appliance removal and you're likely to get a lot of scrap appliances that way.
Right now scrap appliances are going $100.00 per ton so if you can get enough of them then you can do pretty good income wise.
Break them down and take the copper wire and motor and aluminum off of them and you can make even more and you might even find actual money inside the washing machines and dryers.