It goes like this:
I have a need
You have a need
I can meet your need and you can meet mine
So we trade!
Especially in an economy like ours bartering is top on my list of must dos! Just today I made an agreement to barter some materials goods I have to give for some manual labor I can't do.
The Proverbs 31 woman did it: "She sees that her trading is profitable, and her lamp does not go out at night" vs. 18
Now go out and give it a try!