If you want to get the highest price, selling directly to another person is usually your best bet.

These businesses frequently need affordable appliances to stock their rental units and may buy multiple items at once.

You contact a local shop—like Friedmans Appliance in the Bay Area—and they may offer you cash or store credit.

Turning Old Appliances Into Cash: A Guide to Local and Online Buyers

Currently the "king" of local sales, it allows you to see buyer profiles to avoid scams.