I do not know why this fascinates me, but it does. Here is an interactive chart of spot-market oil prices going back to the beginning of the 1950s. You can select time frames from within that period to examine price moves. People who trade commodities probably get a bigger kick out this than I do.
And here is a chart showing the historical prices of oil in constant (current) dollars.
If you are interested in such things, the essay accompanying this chart is pretty interesting, too.
Update: Playing Crude Oil’s Inevitable Rebound

