Sunglasses, unfortunately, are in a stranglehold market. You either spend $20 and get colored glass or spend $200 and get an actual product
I've found pretty much the opposite.
I've owned 3-4 pairs of expensive sunglasses in my life, and all but one of them was crap. I'm convinced that the price differential is for nothing but a designer name.
My favorite sunglasses ever I paid $25 for at Rite-Aid, and I liked it so much I bought another pair to keep in the car. They're polarized, the optics seem good, they're solid and durable, comfortable, and don't make me look like a madman. What else do I need?