The average jar yields $58 in buying power. Most of us don’t realize how much our coins are worth. Thus, a trip to a coin-exchange kiosk (or a bank, or credit union) can yield a pleasant surprise.

To state the obvious, coins are worth money. Coinstar converts $3 billion in coins into spendable cash every year, one coin jar at a time. The average jar yields $58 in buying power. Most of us don’t ...