Update: It was a price error on Amazon.
Batman: Arkham Knight Premium Edition (PS4) – $16.60 (R235 with voucher)
Includes: Batman Arkham Knight and Season Pass
Use the following 10% off voucher at the checkout:
The voucher code is exclusive to PlayStation digital games and DLC. Excludes PlayStation Plus subscriptions, PlayStation Store gift cards, and PlayStation Now subscriptions. The code is valid until the 01/12/2015.
This is the digital version.
The code will be emailed, and you need a US PSN account to redeem the code.
Setting up a US PSN account on your PS4 is a simple process (check here). You will then be able to buy games on the US account and play them on your SA account.