To add an item to your Wish List, go to "Collections" and tap the green plus sign in the corner of the item's icon. If there is no green plus sign there that means that the item is rare and cannot be gifted. You can add up to five items to your Wish List.

To add a fixer to your Wish List, go to "Collections," tap the fixer, and then tap the green plus sign in the corner of the item's icon. You can add up to five items to your Wish List.