Oral-B 3D Whitestrips 28 Treatments - $31.49 @ Chemist Warehouse
Seems like a pretty good price. Coles and woolies have the 14 treatments luxe version for a touch under $30. This version has a higher hydrogen peroxide content which I assume means it whitens better!
Other products :
Oral-B 3D White Luxe Advance Seal 14 Whitening Treatments @ $24.49:
Oral B 3D White 2 Step Brilliance Kit @ $9.99: