Is Keeping Copper Pennies Worth It? (Ended)

I save them when I find them, but I figure the better coins to keep are the pre 2000 BU/AU coins. If they stop making cents here, they would be more in demand. I check for varieties on the BU/AU ones now, but another reason I save them is that if something new is discovered, I just have to go back through my stash to see if I have a better grade example. I didn't vote on the poll my choice would be somewhere both. between both choices. I don't search with a machine that sorts them, but some do. Just getting too old to create a long term stash.