Back in Stock Notifications module (included in X-Cart Ultimate, paid for X-cart Business and Multivendor) can help you to drive more sales by making it easy for your customers to sign up for back-in-stock and price-drop email notifications for the products they wanted to buy, but missed out. It works for both registered and not-registered visitors.

The module also helps the cart admin to find the “most wanted” products and arrange supplies properly to meet customers demand.