Based on my search results, smart cards can range greatly in price depending on the type and features. Some affordable options to consider are the CR-35 Smart 2-IN-1 IC Card Reader for R169, and the A-Data Premier 32GB MicroSDHC Flash Memory Card for R61. These would allow you to read SIM cards or microSD cards in devices like phones, tablets or cameras. The CR-35 also functions as a USB flash drive reader. Let me know if you need any other details on these or have a particular type of smart card in mind - I'm happy to try searching for some alternative options within your budget.