The beauty of the free market is that no exchange ever takes place unless both parties benefit.
I would amend this slightly: no exchange ever takes place unless both parties
think they're benefitting. The actual reality may be very different, and many less-than-respectable sorts will do their darndest to make it be so, as evidenced by the negative connotations surrounding the concept of "the fine print".
The fact that it's extremely easy to have one party get screwed because it thought it was benefitting when there was actually some very important detail being missed is one of the failings of capitalism, really. Capitalism isn't perfect; it just happens to be less worse than all of the other economic models, in general.
