Washington quarters in your change jar are quietly turning into serious collectibles, with certain dates and varieties trading for far more than 25 cents. As more collectors hunt for key pieces that ...

Some quarters that have been circulating for more than 20 years are still worth only face value, but a handful of rare dates and varieties can sell for hundreds or even thousands of dollars. I look at ...

Some of the most valuable modern coins are not ancient rarities but ordinary-looking '90s quarters hiding dramatic minting mistakes. A handful of these Washington and State Quarters now sell for ...