The US PlayStation Store is running a flash sale this weekend, with all the deals under $5 (R59).
To check out the full line-up of games on sale, click here.
The Flash Sale ends the 18/05/2015.
Please note: To access the US web store, you need to be logged into your US PSN account or signed out of your SA account.
Setting up a US PSN account on your PS3 or 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.