I love schoola! I've made several purchases from them at great prices. Sign up with my link to get $15 credited towards your first purchase!
http://www.schoola.com/stitch?ref=cp-3XyejDVK
When you send in your clothes, you personally will not gain money, but the school you choose will receive a donation based on what clothing items you sell. And who doesn't want to help their childs school get new things that they will enjoy?