I didn't realize it, but you can buy junk silver and other silver coins on Amazon.com I was able to buy an ounce of junk silver for just slightly above spot price. I decided that it was a better idea to convert my zinc pennies to silver and pay a tiny premium rather than pay a 9% fee to deposit FRN's into my checking account. Silver will likely go up, making the premium I paid for it on Amazon.com insignificant. FRN's are loosing purchasing power, making that 9% fee you pay just to deposit them back in your checking account less attractive.
Either way, I've just about given up on rolling pennies and turning them into the bank. It's too time consuming and some branches of my credit union will only let me deposit $25 of zinc rolls at any one time.