In early September paddling shops will be liquidating their 2012 gear to make room for 2013 stuff. This is a great time to check around for considerable discounts on SUPs, kayaks, and related gear.
For the Pacific NW, here's a few to visit..
Norm Hann's biz in BC, (inquire within):
Mountains 2 Sound (also Alki Kayaks):
NW Outdoor Center on Westlake:
This is a great shop for both kayaks and SUPs. In late Sept they do an auction of sorts. Watch their site for updates: http://www.nwoc.com
Know of others? Add to the list in comments!