When you hit "edit listing", and go to the drop down menu on the left (the small horizontal lines near the top), down at the bottom will be a box that says 'listed" with a green dot. Click on that, and there is a unlist option.
Go to your listing, click on manage listing, scroll down a little and second or third section on the left is " listing status". Click the edit button next to listing status and then follow the prompts.