Have you checked out ThredUp yet? It's like an online consignment store – they carry sizes for women and children and they have really great prices.
(UPDATE: This coupon code is no longer valid, but visit the site for their current offers.) To sweeten the deal, right now new members can get $10 off ANY order using code SUMMER10 at checkout! That could mean free clothes!! Just pay shipping!
Plus, you can add a sell back bag to your order and then send back any clothes you may no longer wear or need. I am looking at a full ThredUp bag as I type that I'm taking to the post office today. It's postage prepaid and they will send me the money on the clothes they choose to consign!
Head over to sign up for ThredUp for free and check out this great site!