the client has what the freelancer needs: money And the freelancer has what the client needs: the ability to make a web site. A transaction happens when both

the client has what the freelancer needs: money And the freelancer has what the client needs: the ability to make a web site. A transaction happens when both parties believe they're better off with the result: the freelancer wants the money more than the time, and the client wants the web site more than the money.