Just so you know the import cost for the Vita and games would be R0. You would only add VAT to the product and pay shipping which would be quite cheap.
Import tariffs can only be levied on goods if you have a local market that needs protection.
For a handheld, up to R3500? I don't know.. a bit steep considering actual consoles are around that price. But for some reason i expected it cost more. I think i'll stick to my iPhone for mobile gaming.. enough for me.