The next time you're in the checkout aisle at a store, take a look at people in line paying cash. I'll wager you'll see that most people don't take the time to see what they're dong. Without exception, they pull paper money from their billfold and toss change on the counter. Other than checking the denominations they don't give coins a second glance. Why should they? After all, a penny's a penny, and a dime's a dime. How much can they be worth? It depends on how much time you take to look.