I keep my copper pennies. I don't have that many but I always put the pre'82 ones in a coffee can. I figure they are slowly disappearing from circulation much like the wheat pennies. I don't know what I will do with them but they will sit in the coffe cans in the garage.

I also metal detect when I have time and it isn't too hot or soil too dry to dig. Zinc lincolns always seem to be corroded. I clean them up and if they are still intact, I just roll them with any other common post '82 pennies I have.