SheIn offers its SheIn Women's Deep V-Neck Floral Dress in White for $16.99 plus $1.90 for shipping. That's tied with last week's mention as $11 off and the lowest total price we could find. It's available in sizes S to L.
Note: Uncheck "Add Shipping Insurance to your order" during checkout to remove the 99-cent fee. This item ships from mainland China and should arrive in three to four weeks.