I do understand what you mean. But the equilibrium of price between buyer and seller is more complex than that. I mean if someone came on the forums saying that Blizzard should charge $14 a month instead of $15... I'd say what difference does $1 make? I consider WoW to be more than reasonably priced as it is and don't have a strong interest in making it cheaper. The central point is, both parties try to arrive at what they consider a fair price.