The Dynasts of Lykia
From the late 6th century BC to the time of Alexander the Great, these semi-autonomous rulers governed settlements in Lykia on behalf of their Persian overlords. Their coinage is of a high classical style, often depicting the image of the Dynast and the Lykian triskeles (which characterize the series). See this Slideshow of the coins of the Lykian Dynasts.
Amyntas, King of Galatia
Amyntas saw service as an auxiliary commander in the Roman army of Brutus and Cassius. He gained the favor of Mark Antony and was granted the Kingdom of Galatia, but deserted Antony before Actium, aligning himself with Octavian. He died in battle in 25 BC and his kingdom was annexed as a Roman province. See this Slideshow of the coins of Amyntas.
Magistrates of Bithynia, Kios
A collection of various magistrates coining hemidrachms (or half sigloi) ca 350-300 BC. This is from a hoard of these coins, which yielded interesting study specimens. See this Slideshow of the known magistrates. Please let us know if any were omitted.
Kings of Kappadokia
From the time of Alexander the Great to the Roman times, the independent kings of Kappadokia (Cappadocia) ruled this famous land. See this Slideshow of the coins of Kappadokian kings.
From the earliest times of coinage (in 7th century BC) to as late as Roman time, Electrum (a natural and sometimes man-made alloy of gold and silver) was used as a medium of exchange. The result produces a stunning effect in ancient coins. See this Presentation of the Electrum coins.