PC Authority: "It's the age old dilemma of anyone who's contemplated buying a new TV, smartphone or laptop: should you buy it now, or wait for the price to drop?
We know plenty of people who obsessively compare prices from seven different price comparison sites before buying even an HDMI cable.
So when it comes to a big ticket item, like a 55in LED TV, you'll go the whole nine yards to get the best bang for your buck, even wait weeks for a sale, right? But it's something of an educated guessing game.
What if there was a mathematical formula that predicted the best time to buy that TV?"