In the form of legislation, no less. The proposed coin, the centrepiece of H.R. 5680 United States Marshals Service 225th Anniversary Commemorative Coin Act and a similar Senate bill, would feature the U.S. Marshals logo on one side and a tribute to U.S. marshals on the other. Its face value is planned to be $5, but it will contain one full troy ounce of gold. There's also a silver version planned, with face value of $1 and the silver content of an old silver dollar.
One interesting facet of this coin is its proposed date: instead of a single year, it would be dated "2014-2015."