Call it a trading post for fashionistas: Buffalo Exchange not only sells clothes but buys and trades them, too. The funky Capitol Hill branch of this national resale chain is lined with rack upon rack of vintage, designer, and “gently used” duds as well as display cases cluttered with jewelry, hats, bags, sunglasses and other goodies—many of them priced just as they might have been back in the day (think silk sheaths for $10 and cowboy boots for a fraction of the cost of a new pair). Bring your own bag to tote your purchases in, and the store will donate a nickel to the charity of your choice—so you can do good while looking even better.

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