The saturation of content has this affect. With everyone shooting models are in more demand, even though the profit margin is shrinking. Factor that you piggybacking off of their "name" and paying the price for the branding & name recognition; you can't be worried about the prices.
If you can't pay the price maybe you shouldn't be playing the game to begin with. It's a business and not a charity. If there were less people shooting, prices would come down.
