Duduma Sunglasses via Amazon offers the Duduma Polarized Fashion Sport Sunglasses in six frame/lens colors (Black/Black pictured), model no. Tr80821, for $19.99. Coupon code "G58O9PED" cuts them to $12.99. Plus, Prime members receive free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $5.48.) That's $27 off list and the lowest total price we could find, although we saw them for a buck less three weeks ago. They feature 100% UV protection and include a cleaning cloth and fabric pouch.

Update: The coupon now drops the price to $10.99.