Duduma Sunglasses via Amazon offers its Duduma Women's Polarized Designer Sports Sunglasses in nine colors (Black/Black pictured) for $19.99. Coupon code "IMG74TEF" cuts that to $11.99. Plus, Prime members bag free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $5.48.) That's $28 off list and the lowest total price we could find. They feature 100% UV400 protection coating.