Get this PETKIT Extra Large Self Cleaning Cat Litter Box at Amazon.com for only $419 (reg. $799). You save 48% off the retail price for this self cleaning litter box. Plus, this item ships free. We could not find a better price for this litter box online. The PETKIT Cat Litter Box features a 76L capacity, 3 cleaning modes, and works via Wi-Fi. Sales tax is charged in most states. Deal may expire soon.