When done, you send the package and the fee is taken out of your account. The package is then delivered to Optiques Go Guardian. As usual this is interesting food for though and well worth a read. Economy is not just the coded ability to buy, sell and trade. It is the connection between these factors, and preferably the ability to craft and destroy items.
Any healthy economy is based on supply and demand.
For those of you not familiar with this, supply and demand is basically the concept that when there is a low supply of goods, prices go up. When the demand and supply is high, prices go down. If the supply and the demand decreases the price increases. And of course, the demand affects the supply on the market. Atleast, that was the way it was explained to me back in school.