ShipStation already supports inventory tracking for products, but at least for me that isn't terribly useful as I track that in other places. However, what would be incredibly useful is if the inventory tracking system were extended to cover boxes, maybe packing materials as well. Especially with the ability to create custom package sizes (or to select which flat rate box sizes you use), adding the ability to add a stock quantity and automatically deduct from that stock when one is used would really simplify keeping up your supply of boxes.
