Originally Posted by
bruce19
What am I missing?
Probably nothing.
I've actually found all of the pricey sunglasses I've used to be functionally disappointing. The lenses are usually hard to clean, scratch easily, and fog readily. And the frames overly rely on static friction rather than geometry to secure the glasses to your head, making them more abrasive than the cheap stuff.
My favorite sunglasses have been in the $12-$25 range.