BuyDig offers the Prestige Edge Women's Turtleneck Sweater in six colors (Dark Brown pictured) for $39.99. Coupon code "70off" cuts it to $11.99. With free shipping, that's $48 off list and the lowest total price we could find for this sweater. It's available in sizes S to XL.
Note: The coupon requires payment via American Express, Discover, MasterCard, Visa, or PayPal.