Where can I buy cheap alternative clothing?

I've been trying to completely clean out my current wardrobe and fill it up with my current style. I really like the alternative and hipster style. I specifically love how Alison Mosshart dresses. I idolize her. So, I need some REALLY cheap online clothing stores. I love Urban Outfitters, H&M, Top Shop, ect. but they are all WAY to expensive...Any ideas would be helpful!