In the case of no inventory on the Amazon seller platform, you can consider the following methods:

1. Pre-sale model: accept orders through pre-sale before the product goes online, and then produce or purchase according to the order quantity. This can avoid the risk of backlog of goods.

2. Cooperate with suppliers: cooperate with reliable suppliers or manufacturers, send orders directly to them, and then they will ship directly to customers. In this way, you can save inventory costs and reduce risks.

3. Buy from other sellers: If there are other sellers with inventory, you can choose to buy from them, then re-list and sell at a higher price.

4. Dropshipping model: establish a partnership with suppliers or wholesalers and use their inventory and delivery services. When an order is generated, you transfer the order to them and they will be responsible for shipping. No matter which method you use, make sure you understand the relevant laws and regulations and the regulations of the Amazon platform to avoid violations. In addition, paying attention to providing excellent customer service and good product quality is also the key to the success of Amazon sellers.