Used books on the cheap

Dude, this sounds so cool: the online used-book retailer Once Sold Tales has opened a brick-and-mortar store (well, less bricks and mortar and more a corner of one of their warehouses, but whatever) where they sell books for a flat $1 a pound. You'll have to make your way to the wilds of Kent, WA to visit, but if you're in the area...