The abomidable practice of human slavery compelled President Abraham Lincoln to affix the motto IN GOD WE TRUST on US coinage as early as 1864. Way before that, in 1822, Liberia, on the east coast of Africa, served as a homeland for freed slaves with the US government providing funds for securing land from tribal chiefs. IN GOD WE TRUST first appeared on Liberian coins in 1889.
Starting around 1990, the modern country of Liberia began to issue commemorative coinage featuring all sorts of US- and world-based themes. These commems are issued in 1, 5, 10, 20, 25, 30, 50, 100, 200, 400, 500, and 2500 dollar denominations. These coins are worth face value in Liberia. One Liberian dollar is worth about 1 US cent.
Many of these coins are worth their weight in gold and silver. If your coin is made of precious metal, then the value is equal to the amount of gold or silver it contains.
Use kitco.com to find the current value of gold and silver, and use xe.com to find the current conversion between Liberian dollars and other currency.