I've only been in as a shopper and am usually able to find a few pieces that work for me. There's a lot of stuff to dig through, but you can find some gems if you take the time.
I'm about to try my hand as a seller and will update if needed.However, having just called in, I do know that to sell, they ask the following:
1. You can bring in 30 items or less to sell without an appointment. More than that and they ask that you set up a time to meet with a staffer.
2. Bring items in freshly laundered and ironed (if needed).
3. Bring items in on hangers. They will swap hangers out if you need yours back.
4. They want items that are classically stylish or are of-the-moment (1-2 years old).
5. They will place your pieces on the floor for a 60 day period. They may mark the price down towards the end of the time to try to move the item. Unsold items can either be picked up or they will donate to charity.
6. You get 1/2 the sale price.
7. They do accept maternity clothing and men's clothing, although they're pretty picky since they have limited rack space for those.