eBay listing error - The quantity must be a valid number greater than 0.

eBay doesn't allow listings with quantity 0. This error then arises if the quantiy of the listing you are trying to create is 0.

Easily resolve this issue by editing your listing to provide a quantiy more than 0, save and publish your listing to have it successfully listed.

Contact support at customer-success@syncommerceapp.com if the problem persists.