All commodities in the World Bank yearly database are graphed. This includes some price series that do not differ much, or only differ by a relatively small arbitrage.
Most of the series begin in 1960. For those that begin later, I started when they begin (duh).
The Y-axis is the deflated price of the commodity, using the latest month as the basis. All prices are adjusted by the US PCE deflator and the value of the $US relative to other major currencies.
The X-axis is time.
The last point on the line is the current price, or as current as I could get.