$15 off purchases of $70 or more with code 2015. Got this from their newsletter. $15 off $70 works out to be just over 20%.
The Canon Ixus145 is currently on sale for $103 (20% off sale) and with the coupon code brings it down to $88. Next best price according to PriceSpy is $109.
Terms and Conditions: *Limited to the first 100 customers only. Valid from 1pm - 11:59pm NZT on Tuesday 6th January 2015 unless sold out prior at www.dicksmith.co.nz only. Excludes Dick Smith Commercial, Wholesale or International customers. Not to be used in conjunction with Woolworths Discount. Dick Smith reserves the right to withdraw this promotion at any time. Only 1 (one) discount per transaction per customer is permitted. Excludes Fit Bit branded products, Apple iPhone 6, Prepaid Mobile Products, Calling Cards, iTunes and App Store Gift Cards, Dick Smith Gift Cards, Xbox Live and PSN Cards, and Gaming Accessories, Software and Consoles.
Also doesn't seem to work on the Kindle Paperwhite.