Cheap? Ray-Bans? They retail for, like, a lot of money. More than is acceptable for a commonly-misplaced cranial accessory. If I had real ones, they'd be worth more than the rest of my clothing and my shoes... combined. Ray-Bans are normally not cheap. But mine are.
They're fakes from DealExtreme in Hong Kong. Nice fakes, though. The polarized lenses are lovely, but the nose-pieces are a bit on the weak side. I got a good year or so of use out of these $10 glasses, but the nose-piece on the right finally gave up the ghost while I was painting a house. Over some gravel. (No rescuing and re-wiring for me; I couldn't find the missing piece.)
I had almost given up and ordered a new pair when I started working for Instructables. Which provided easy access to a ton of Sugru. Which means... I finally get to fix the glasses! Flexible nose-piece replacements! The comfiest pair of knock-offs in the world**. Keep on clicking for the remarkably easy instructions for fixing your glasses, knock-offs or otherwise.
*My father's description of the glasses, not mine.
**Further scientific research may be needed to substantiate this claim.