This is one of the best thrift stores within the Seattle city limits. They re-stock all day long (as opposed to the places that only put out fresh stock in the AMs and generally not at all on weekends).
They carry great brands at great prices. And their clothing seems to be in better condition than other thrift stores.
I concur with all of the socially responsible reasons wys r. listed. Not only are you engaging in the ultimate recycling, but your money is supporting and strengthening the community.