Swap back - return to original exchange

In primitive society, people used the most primitive exchange method - bartering for goods they needed, such as exchanging two sheep for a cow.

A real story that happened in the United States reveals the tremendous power of bartering: Kyle MacDonald exchanged this paperclip for a house...

Like millions of ordinary young Americans, Kyle MacDonald couldn't afford to buy a house, but he had a more creative idea: learning from the primitive residents and doing barter trade. Since July 2005, MacDonald has been using the Internet to start exchanging with others, starting with a red paperclip, then getting a fish-shaped pen, and then exchanging the pen for a small piece of artwork... a car... As the items changed, MacDonald eventually got a beautiful duplex apartment without spending a penny! On April 17, the Associated Press told the story of how MacDonald exchanged a paperclip for a house.