Somewhat OT, but still Canon:
Through 3/17, use Priority Code 30CALC312
to save $30 on the Canon X Mark I Mouse Slim Wireless (Bluetooth) Calculator
and the Canon X Mark I Wireless (Bluetooth) Keypad Calculator
These calculators are regularly $59.99 at the Canon Store. A $20.00 price drop brings them to $39.99 before the $30.00 off coupon brings them to $9.99.
I have the predecessor to this calculator and really like it - I ordered the new keypad calculator version at this price.