Unless it is a pre-order item all our inventory is live on the store. This means that the store won't let you buy a product we don't have ready-to-ship immediately.
In order words, if it's a regular product and you buy it, you won't get a back-order notice from us.
Since our store is pretty small and all of the inventory is store in Adam's office, we don't keep mass quantities of books on hand. We do offer case quantity discounts which allow us to ship your order directly from the publishers warehouse.