At first I thought that those were the dumbest things ever. As the number of children and the souviner budget increased, I realized that not only do I like coins so these are perfect for me, but where else can I can buy for $.51?
I carry a tube of pre-1982 cents with me on vacation and anytime we go to someplace that might have one. Now, I get everyone I see (yes all three or four designs from each machine)