Duke University Libraries is home to AdViews, a humongous archive of vintage commercials. When AdViews first made an online presence, the commercials were only available for viewing on iTunes. The collection is now also available for viewing here at the Prelinger Archive. Sites like YouTube have made lots of vintage commercials available, but I am impressed by the high quality of the AdViews spots. Here is a Post Pebbles cereal ad from the 1970's.