SheIn offers its SheIn Women's Cold Shoulder Keyhole Back Sheath Dress in Black for $9.90 with free shipping. That's $14 off list and the lowest total price we could find, although we saw it for $3 less three weeks ago. It's available in sizes XS 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.