Went llooking for some of these flat rate boxes today and the rural PO's near don't have any yet, but, you can order them online. I figured you paid $7.70 for the box as it would already have to postage onit, but I was wrong. You can order the boxes right from the USPS site at no charge and they are delivered to your door in 10-14 days, again at no charge. 25 boxes to to a pack.