While I agree that it is way overpriced, the point of it being more expensive is to encourage the sale of gold people get from donations (mainly) and voting. If all the stuff in the forge were to be changed to reflect the current economy, the amount of people buying/selling gold would decrease and as a result would discourage some people from donating.
Also, lets not forget that prices fluctuate constantly, and there would be no guarantee that what you pay now for all those items would be what you pay in lets say in a months time. I personally think there is no need for that forge to be there any longer.