New boxes are being posted every day. There is a strategy to getting the best boxes:
1. Post a few boxes - it's FREE. Every time you post a box, you get a credit to pick another box. So post three boxes, get three credits... save them!
2. Sign up for box notifications (in your account settings) so you find out right away when a box is posted that contains exactly what you're looking for.
3. Jump on the site and grab it. It's only $5!