In my case I can't always restock the products the customers want, so I have a "request restock" mod installed, so it's better that backorder in my case.

Thanks again kuroi ^^.

Quote Originally Posted by kuroi View Post
The order would be treated as a backorder. An alternative would be to set "Products status in Catalog when out of stock should be set to" to 1, and rely on customers contacting your manually through the contact page.