American Airlines traded eight 747s for twelve DC-10s owned by United Airlines. this transaction is an example of barter. Barter is a commercial transaction whereby two parties are exchanging goods or services without the involvement of money. In this example, it is clearly a barter transaction. The American Airlines traded a property with another property to United Airlines. There was no involvement of money in this transaction. The quantity of the property being traded is not necessarily equal because this would depend on the price of the property being traded in by the parties. In this example, United Airlines traded more pieces of their property to American Airline. This may be due to the price difference of the two properties.