SheIn offers its SheIn Women's Deep V-Neck Pleated Lace Dress in White for $14.99. Coupon code "DN35" cuts it to $14.54. With free shipping, that's $8 off list and the lowest total price we could find, although we saw it for $3 less last month. It's available in sizes S to XL.
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.