CCC Says: "I hate to say I told you so but… 私はそう言った (Translation = I SO told you so).
While there are many different economic systems in place around the world (from capitalism to socialism and so on), the principals of supply vs. demand are fairly universal. If I possess an item you want, the demand is in my favor. Therefore, establishing some kind of fair-trade agreement between the two of us should be pretty straight forward. If more than one person desires what I have, the demand only continues to go up and up (thus improving my ability to negotiate). On the flip side of that coin, if supply far outweighs demand, its value is obviously diminished."