I'm not entirely sure why all of Sephora by OPI's Nail Colors are on sale, but why look a gift horse in the mouth when you can spend lots of money appreciating it instead? (That's a saying, right?) Normally each polish is $9.50, but they're all marked down to $4.50 now. (Maybe they're redesigning the bottles?) At less than $5, they're even cheaper than most drugstore brands and there's a HUGE range of shades. And at least at my Sephora, almost all of the shades are still available, so it's not like you're going to have to buy hideously ugly neon greens or anything to take advantage of the price cut. Even the sets are on sale. I would, however, move super quickly to buy the shades you want because the most popular ones are already selling out online and I'm sure the stores will quickly run out of stock as well. Good deals never last!