SheIn offers its SheIn Women's Floral Flare Dress in Black for $15.33. Coupon code "inst33" cuts it to $14.18. With free shipping, that's $7 off list and tied with our April mention of a different color as the lowest price we could find. It's available in sizes XS 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.