I can go to the bank, pick up a box, deposit zincs, sort, list, sell and ship 10,000 pennies in about an hour spread over 3 days. My average net on a 100 dollar investment is, and is 133. You woul take a 33% return in three days on any investment. The worst thing that happens is I get a box with few copper pennies.
A sorter that separates 10,000 copper pennies from copper-plated zinc pennies in an hour? Do they exist? I still value my time more than $33.00 an hour. I like my money to work for me while I'm doing something else.
Thats the one I have but I got it second hand for 200 bucks. Mine also has some custom features which drop the pennies into tubes for easy rolling.