Oakley offers its Oakley Flak Jacket Prizm Polarized Sunglasses in Deep Water for $138.50. In-cart the price drops to $117.72. With free shipping, that's the lowest total price we could find by $32. They purport to filter out 100% of UV rays.
REI-Outlet offers the Oakley Unisex Tinfoil Sunglasses in Brushed Chrome for $118.73 with free shipping. That's the lowest total price we could find by $12. They feature plutonite lenses, C-5 alloy frames, and 100% UV protection.