Recently we received some feedback from players in the Steam Store Australia, telling us that the tagged price for OST3 shown in the store is wrong. After our developers double-checked it, we found that a point representing the decimal was typed incorrect. The correct price should be 4.5 AUD instead of 45 AUD.
Due to the discount event, we cannot currently edit and change the price in the steam store. We sincerely apologize for this inconvenience, and we will immediately fix this problem after the discount ends.