Just thought I would let people know about the online consignment shop called "Twice". They sell used basic mall brand clothing, lots of it is higher quality because it was manufactured before stores started making everything out of junky and cheap fabrics.
I've placed two orders from them and received the stuff in two days because they ship USPS priority. Sadly the only thing that worked for me was a pair of Abercrombie jeans but I was still really happy to get a great fitting pair for $12.
They post measurements (however their "bust" measurement is kind of weird so I just generally buy my normal size in tops) so it is easy to get an accurate fit and returns are completely free as well. I've never sold to them so I can't speak about that aspect of the site, but they will pay for you to ship your clothing out to them.
You get $10 free on your first order, free shipping over $49. I included this in the classifieds section because I also get $10 as a bonus if you end up purchasing through my link, so I just want to post in case anyone is interested in placing an order!