Curiosity ....? is CURRENT market value?.... copper pennies

I've been sorting now for several years just as many of you have been. My initial hopes that I might someday be able to realize a bit of a "gain on investment" (despite a possibly extended time of holding) is still my hopeful anticipation. Who knows? Maybe my grandchildren will be able to redeem a few thousand $ face value copper pennies into a 3 or 4 fold profit given the "then current" base metal value and well after any melt prohibitions have been repealled. WHATEVER! Anyway, my question of the moment is ... what if any is the current (early 2013) "market value" for pre 1981 copper pennies? Could I hope to sell any quantity of coin for a penny and a half on the cent?... Would I have to settle for 1 1/4 c on the penny? could I even get that today? What prospects for the future market and continued waiting? Just a lot of thots for thinking about!!!! At almost 70 years of age, I have some minimal hopes for the security of my grandchildren, possibly connected to my sorting efforts! Your comments are coveted!