Regional barter exchange, serving Pittsburgh area. http://www.greenapplebarter.com/
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Barter Exchange with members in Michigan, Ohio, and Florida. http://www.tradefirst.com
Clearinghouse for barter exchange between New England businesses. http://www.newenglandtrade.com
Barter exchange in Atlanta, Georgia, USA. http://www.barterco.com
is made up of 5,036 groups with 8,913,534 members around the world. http://www.freecycle.org