VAT back is a great deal for frequent flyers/shoppers.

South Africa is one of the best places in the world to shop. I can't think of another country with the triumvirate of a depressed economy, high inflation and a significant middle class. This means that general goods that you actually want to buy are cheaper than anywhere else in the world. Other countries that are poor with no middle class don't have such cheap shopping for quality goods.

That said, going to the source is usually a good bet. Ideas such as glassware in Italy, cashmere in Scotland, etc. are good.