Where can I purchase Hongkong Disneyland ticket at discounted price for 3 adults? How much is per ticket?

I just know pssengers who are arriving and leaving HK by air on the same day can purchase the In-Transit Easy Pass for just HK$300 and enjoy free luggage valet service for 1 piece of luggage.

As for the hostel with pick-up service, I just lived in Dragon Hostel, which provides free pick-up service from Mong Kok bus stop, which can be reached by taking airport shuttle bus no. A21, to the hotel directly.