1. Gaithersburg Coin Exchange 16 E Diamond Ave, Gaithersburg, MD 20877 Coordinate: 39.14206,-77.19709 Phone: (301) 284-0876
2. Landman & Co. 11 Beacon Hill Way, Gaithersburg, MD 20878 Coordinate: 39.13135,-77.23804 Phone: (443) 525-0478