The TI Nspire CAS Touchpad calculator is on sale for only $30 at Dick Smith. Sorry, but there is no link on Dick Smith's website. I stumbled upon it by accident at Dick Smith Victoria Gardens in Richmond. I am not sure if the same deal is available at other Dick Smith shops as well.
This is a very good calculator for the price (Amazon is selling it for over $100), but I am not sure if it is allowed in all schools and universities. The keypad slides out and can be replaced with that of a TI-84 to make it acceptable for exam use.
See http://education.ti.com/educationportal/sites/US/nonProductS…
a very nice calculator. Super awesome price, would have got it if i was still in University or something.