http://www,kitco.com ASEs will carry a small premium over generic .999, but buy price usually is around spot.
That's the American Silver Eagle. It's a silver bullion coin, with 1 troy ounce of .999 silver. It's not used as currency, but rather for investments/collections. NOTE: see http://en.wikipedia.org/wiki/American_Silver_Eagle
I've had a few occasions to buy them out of store cash registers. Nicotine or alcohol fits can be powerful weapons. Chris