Geez... I get $187 for $100 worth of pennies (all pre-1984, as they are solid copper).
I don't ask what the buyers do with them, and I don't care. I have a sorter that will go through 50,000 pennies a day (about one every 2 seconds, so it is slow). Almost beats having a real job.
Generates over $65K a year. (though I get funny looks when I have to go to the bank and pre-order $500 of pennies every day).