There are many different things you can trade your Wii in for. You can trade this system in for another system or for money.
The World Trade Orginization replaced the failed GATT program of the Bretton-Woods System
money
Barter
they had a barter system. they didn't have money, just trade goods,
,
Trade.
so at trade they can have a money everyone wants
After the trans-Atlantic slave trade was declared illegal and later eliminated, it was replaced by legitimate trade (non-slave trade).
peanuts , timber, hides, and palm oil replaced the slave trade in west africa.
A trade, an exchange, or barter. An economic system which operates without money is called a barter system.
The use of money increases economic efficiency because without it, we would be a barter system. In a barter system, if I want potatoes, and have oranges to trade, the person with the potatoes has to want oranges to be willing to trade with me. With the use of money, I can give him a known amount of value in money, which he can buy what he wants to with.