Many communities have their own Facebook groups where you can buy and sell. You will not have the selection you would on eBay, but you will save on shipping. I have bought and sold successfully this way.
Tips for Using Facebook
Protecting Your Privacy on Facebook
Uses for Expired Baking Powder?
Promoting Your Business on Facebook?
Using Facebook to Make Phone Calls
Giving Household Items Within Your Community
Locating an Ex-husband