SheIn offers its SheIn Women's Long Sleeve Turtleneck Sheath Dress in Black for $12.70 with free shipping. That's $10 off and the lowest total price we could find. It's available in sizes S to XXL.

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.