For a regular player it is not easy to follow the markets in an online game: He can only see snapshots of it, and only when he is online. Often past sales are invisible to players, or only a limited history is available. Ever wondered how much more information a dev would have? Then have a look at this EVE Econ Dev blog, where one of the devs shows you the complete history of the EVE Online metal market over the last 3 years.
Thanks to Thoms for sending me the link.