Prices know more than you do
How much information do prices contain? A huge amount.
Which is better for making a decision? Knowing the price of something or having perfect knowledge what something should cost?
If you think the latter, then you need either a crystal ball or tremendous amount of time to accurately research every single fact in the entire world-wide market.
If you think the former, then you can just look at the price of an item.
Professor Michael Munger illustrates this in a video, What Do Prices “Know” That You Don’t.
[youtube=http://www.youtube.com/watch?feature=player_embedded&v=WPy-QKXofQs]