5. How does the exchange make its money? Who pays the exchange and how much is charged? Barter exchanges are organizations that facilitate barter transactions between buyers and sellers. Many of these exchanges are members of the National Association of Trade Exchanges (NATE). First, visit the NATE Web page at www.nate.org. Using links on that page to NATE member exchanges or an Internet search engine, locate and explore several barter exchange Web pages.