Are you just speculating about the prices since the prices seems to be at a stable range to me. As for tobirama, him and the other hokages priced like that for no other reason and continue to be priced in China. Seems like thereis no consideration of "meta gameplay" in their prices. The only exception was 3rd hokage when people asked for him to be more available. Yes master is on the more expensive of the clothing because of the initiative stat.