REI-Outlet (http://www.rei-outlet.com) has a coupon good for 20% off of any one item except what is stated below. Use coupon code GM224 at checkout.

Offer not valid on REI.com items, REI Adventures or retail store purchases.
Offer not valid on special orders, package discounts, REI gift cards, gift boxes, memberships or shop services.
Offer not valid on Suunto or Oakley products.
Offer not valid on bikes or boats.