My guy is in need of some aviator sunglasses. Black, gray, or metal frames are all good, and gray lenses are best. He would prefer to pay less than $40 (less is better), and wants them to be polarized with UVA and UVB protection. Know of any good ones?

He's found several on aviatorsunglasses.net and sunglasswarehouse.com, but I'm a bit nervous about these websites, so if anyone has any experience with them that would be helpful. THANKS!