Copper Price is as Expensive as it was in the 1970s â Inflation Adjusted Historical Copper Price since 1900 in Pounds Sterling and US Dollars.Copper Price Today is as Expensive as it was in the 1970s Once Accounting for Inflation Copper in a common metal which as been used si...Aluminium the Metal that has Never been so Inexpensive â Inflation Adjusted Historical Aluminium Price since 1900 in Pounds Sterling and US Dollars.opper Price is as Expensive as it was in the 1970s â Inflation Adjusted Historical Copper Price since 1900 in Pounds Sterling and US Dollars.