What you don't understand is supply and demand. Demand is high, Supply is low, therefore higher price. You increase the price to lower the demand and your trying to hit the point where supply = demand.
Then you hit a point where the demand doesn't meet the current price, so then it drops. hence it going from 50k-30k. Look at computer parts, cars, or just about anything, same thing.
also the morph is producing more females than males