The value of something or someone. True. What is the price tag of darkness for the few dim seconds of light you will have? It may be worth it to one person however not to another. How much do you love or need that . Emotion plays a big part in the worth factor. Also how in demand it is by how many people. Some worths keep their value or may even increase in value while others diminish over time. Culture and values also change the worth factor. Thanks for sharing