Barter
There are many different things you can trade your Wii in for. You can trade this system in for another system or for money.
money
Bartering
they had a barter system. they didn't have money, just trade goods,
,
Trade.
so at trade they can have a money everyone wants
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.
Barter is a system of trade where people exchange good or services without the involvement of money.
Walras
Walras