Plato's Closet is the best place ever. I'm seriously going today. I've probably made over $150 selling clothes there and I have a big duffel bag I'm taking in today. Not to mention, they've got really cheap jeans [A&F - $8 last week]. I've never bought a guys shirt there, though, because they usually seem kind of dirty. I bought some shorts and a long sleeve Hollister button-up shirt there once and they were of pretty good quality, though.