In an embodiment, a computer-implemented method operating at a server system is disclosed. The server hosts and electronic procurement system. A first user purchase request to purchase an item is received, and a second user purchase request to purchase the same item is received. A determination is made if there is sufficient stock of the item available to fulfill both user purchase requests. The first and second user purchase requests are prioritized, if there is insufficient stock of the item available to fulfill both purchase requests. A purchase order is generated for at least one of the first and second user purchase requests in accordance with the prioritizing. Related methods and systems are also disclosed.