Great question! An item that is backordered could be due to a variety of reasons. Typically manufacturer availability is the most common. It is fairly common with new products just coming to market, otherwise it can be due to sourcing all the resources needed for said item. Other times it may be a distribution channel we go through is out of stock of the particular item. With all the products we have on our website, it would be incredibly difficult (and costly) to store every item for purchase so items that are purchased less frequently sometimes will require an order to placed for them once a customer purchases them. If you have any additional questions regarding backorders, especially on a particular item, please feel free to contact our customer service department at 888-276-7130.