of course that is the price for printing a single prototype PCB. If he were to mass produce (say get 5000 boards printed) it would cost much cheaper than that. But since he can never sell that many boards, I don't think he'll ever mass produce this and offer for sale. also building up a board requires much work and time I presume.
I quoted that price just to give an idea how much this prototype has costed to this guy, not to give an idea how much it would cost if he sold it.