Get Little Black Dresses for $25 or less from brands like LOFT, Forever 21, J. Crew, and more at thredUP. thredUP is an online consignment store that sells like-new children's and women's clothing. Some items include this J. Crew Casual Dress which retailed for $148.00 and is now priced at $23.99, available in size 6. Or this Forever 21 Cocktail Dress which retailed at $29.00 and is now selling for $10.49 in size small. Shipping is a free on your order over $50 or pay $2.99 for the 1st item and $0.99 for each additional item.