You do not have a link list with a handle set to sold-out, or you do and it's empty. Go ahead and create a link list called Sold Out on your Navigation page and populate that link list with links that point to collections, to see collections listed here. Make sure the link list also has a handle set to sold-out.
Everything at Coast Chimes is one-of-a-kind, and when something sells, it is gone. While scrolling through the current, available, stock, please be aware that if you see something you like, it may soon sell, and you could miss your chance if you do not buy it immediately.