What's Interesting is that majority of luxury sunglasses are manufactured by one company in Italy - Luxottica.
The cheaper ones are mostly made in China or Bangladesh etc.
I think people only pay for the "branding" or in rare occasions the design. In my experience even a $10 sunglass from a sports store is as comfortable as an Oakely
The reason I buy cheap ones is because I keep loosing or breaking them and I dont think I am rich enough to misplace a Prada and not care :D
Did not know most were from one company. I'm with you on the rest of what you said. I like cheap sunglasses myself!