EXPIRED Raspberry Pi 3 Model B US$27.50 (~ R340.56) Shipped | Lightinthebox
For our techy users. Normally goes for $47.50. For those who don't know what a Raspberry Pi is, a description from Wikipedia: The Raspberry Pi is a series of small single-board computers developed in the United Kingdom by the Raspberry Pi Foundation to promote the teaching of basic computer science in schools and in developing countries.
Some other gear you might need.
DIY 16 in 1 Sensor Module Kit for Raspberry Pi:
Raspberry Pi 3 Aluminum Alloy Metal Case With Fan: