Penny hoarding is a waste of time (in my opinion) and space. Copper pennies average about 150 per pound. Current copper prices are about $2.60 per pound.
If and when those "hundreds of pounds of pennies" are finally cashed in, let's say someone does make an extra buck a pound. So... Instead of cashing out now, and making $300... someone cashes out 20 years from now for $500 (but the pennies are worth $300).
Do you really think you can't do something better with your $300 in the meantime? For example, go cash in and buy silver when it's low, sell it when it's high, and repeat. Do that 20 years, and I'll bet you have way more than $200 in profit. Heck, you're actually better off taking that $300 now, and buying coin rolls and hunting for silver. The return will be better, even if it's slow! You'll never lose your investment, and you'll eventually end up with far more...
Good grief. Penny hoarders make me laugh. Especially since they've already been doing it 20+ years, (some of them). Silver, I get... but pennies? Seriously?
Skippy