Victoria's Secret offers its Victoria's Secret Women's Angel Sleep T-Shirt in 10 colors (Black Forever Angel pictured) for $24. Add two to your cart for $40. With $8 for shipping, that's $8 off list and the lowest total price we could find, although we saw a single T-shirt for $21 shipped in January. It's available in sizes XS to XL, although not in all size/color combinations.
Of note, coupon code "SHIP50FREE" bags free shipping on orders over $50.