"The WoW Token is a simple market. All the tokens are identical, and have a static real-money cost. When there are more people wanting to buy gold than people wanting to sell gold, the price falls. When there are more people looking to sell gold than buy it, the price rises."
When Blizzard (the people who run World of Warcraft) first
"Prices fluctuated so much because nobody knows what a WoW Token is worth now. Since the WoW Token interface also doesn’t let you know how many tokens are actually for sale at any given time, it’s unclear whether buyers and sellers are rushing into and out of the market at different price points, or whether a single gold-rich buyer using a low point as an opportunity to liquidate can send the price skyrocketing."