Does Amazon.com restock whenever item is gone?

Amazon.com does not automatically restock every item once it is sold out; restocking depends on the seller and the product's availability. For items sold by third-party sellers, restocking is at the seller's discretion. Amazon may restock its own inventory for popular items, but there is no guarantee. Customers can often sign up for notifications to be informed when an out-of-stock item becomes available again.