Sign up for their email list, check their REI Outl...

Sign up for their email list, check their REI Outlet page online, and browse their clearance racks at the store. If you are patient, you can get some incredible deals on name brand clothing.

Once a year, they have a "Garage Sale" in the basement of this flagship store. The best deals can be found at that time, but from what I hear, you'll need to be comfortable with "door buster" crowds. Ask an REI representative for more details about timing for the Garage Sale.