Many eye places have a "get an exam & buy a pair of glasses get a second pair for free or half price" or something like that, and usually you can get the second pair to be prescription sunglasses. If you just want the one pair I'd look at America's Best or some other place that has cheap "as opposed to designer" frames. As far as polarization goes, word is that some aircraft have polarized windshields and if you wear ploarized glasses it will cause blind spots. Unless you are flying some advanced aircraft this should not be a problem. If you are just flying GA aircraft you shouldn't have anything to worry about, and if you are flying something with a polarized windshield I'm sure you would know about it. However, polarized lenses are expensive so if you want cheap, polarized is not the way to go. Other than that I don't think there is anything special you would need to consider. I got mine as my free second pair at Site For Sore Eyes when I had my last exam. They are nothing special but they do the job great.