IF you're a staples email subscriber, you got one of their special offers emails yesterday with coupons. One of them is a 20% off any powershot coupon. I just did this today so I know it works (Replaced my aging sx1 with this camera) - these are one time use coupons tied to your email, so sign up for the staple's deals mails if you aren't already.
Regular is 349.99. To add sugar coating on top - they're giving you a free-after-rebate SD card and 2 year protection plan. (staples rebates are usually pretty reliable) - you can opt out of these if you wish. Great camera, and getting one for sub 350 is unheard of.