Need to keep an eye on what your competitors charge? Let software do the work for you.Chances are you've looked on Amazon for a used book that didn't seem to be anything particularly special. And yet, when you saw the price, you thought to yourself, "Am I in the wrong business?" It was hundreds. Maybe thousands.In fact, in one case a book about the genetics of flies--you know, the things you swat at during the summer--led to a price duel between two sellers that ultimately reached tens of millions. Each of the two set a price that was a consistent multiple of the other. The result was the ... Read More