Windows Home premium retails for $199.99 in the States.
The $ / South African Rand exchange rate is around 7.5.
So: $200*7.5 = R1500 as a base price. I would expect them to slap on some import duty or taxes or something, so the eventual retail would be even more expensive.
Lo and behold, I can buy 7 Home Premium for R1300 at one of our local e-tailers, well below what I expected. In dollar terms, it's around $27 cheaper.
I'm not sure if the $199.99 is still current, but it's what Microsoft quote on their website.