At this point, I only buy my sunglasses from the fishing aisle in the sporting goods section of Walmart. The Ugly Stik pair I got most recently is the best pair of sunglasses I've ever owned, and only cost about $10 (must have been on sale) - they are polarized and block glare great, are comfortable, and cover enough to work as safety glasses in a pinch.

http://www.uglystik.com/uglystik-apparel-eyewear/ugly-stik-s...