The market for used appliances exists, but it is largely dependent on the economy. During economic downturns, the market for used appliances increases because people try to save money. During economic upswings, the market decreases because people have the money to buy new appliances.
Many people use Craigslist to buy and sell used appliances. It is possible to make money buying and selling used appliances by buying very inexpensive used appliances with minor defects. After cleaning the appliances and making the fixes, it is possible to resell them at a profit. As of 2015, it is possible to make anywhere between $75 to $200 per transaction, depending on costs.