If "Ignore stock levels on unmanaged items" is ticked, then you can sell as many as you require, and the stock levels won't be tracked.
Have a look at similar frequently asked questions or visit our FAQs page for more information
Can the purchase order screen be set to display reference only?
Do you link to ebay for inventory management?
How can I manage stock without connecting to Xero?
How do I add my logo and company name to invoices and delivery notes?
Can TidyStock be integrated with WordPress for an eCommerce platform?