
Barter: to trade by exchanging one commodity for another
http://www.merriam-webster.com/dictionary/barter
Barter is a method of exchange by which goods or services are directly exchanged for other goods or services without using a medium of exchange, such as money.
http://en.wikipedia.org/wiki
In today’s economy, barter works much like a credit card/banking system. The big difference is that instead of having to write a check at the end of the month, you simply supply your goods or services as payment, or credit.
The concept of barter is simple:
If you are a Web designer and you need $500 of printing, you have a choice. You can either pay cash of $500 for the printing or you can trade $500 worth of your service into the system, which actually cost you how much? The hard cost of your service.
—Barter enables you to save the difference between the hard cost of your product/service
And the cost of the $500 of printing.