That is an interesting chart. If they did lift the melt ban tomorrow, you would never get the "melt value" listed on Coinflation would you? It would be the lower line since as they put it on the above link...."Copper Value" is a reference point only. Copper pennies are a brass alloy that would sell at a significant discount to pure copper.
I guess I don't see why people are paying so much for the pre 82 pennies, but as long as they are, I'm selling!