I came across these while looking up a non-metal commodity historical prices at work. Maybe someone else has used these. Neat to see things over a 30-45 year span. I think the metals on here (scroll down to "related charts") actually show that most have established new "base" prices over the past decade or so that are higher than what they brought in the 70s through 1990s. Then again, our money is worth less than it was back then so that needs to be kept in mind. Have fun!
Copper Prices - 45 Year Historical Chart | MacroTrends
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