The ten stele are 2st to 3rd century AD, and can be located to Lydia based on the dialect of Greek used.
The Turks spotted a stele on the art market, and contacted the FBI; whilst they items were in the Interpol database, they seem to have been stolen before the Ministry of Culture started listing stolen material online. This case was sorted out through law enforcement channels, and for once the various for-profit groups and bounty hunters seem to have forgotten to issue press releases claiming to have helped to raise funds.
FBI — Photo Gallery: FBI Returns Ancient Sculptures to Turkey
UPDATED The gallery selling them was edgarlowen.com, and quite a few are still on his web site:
Feel free to browse the rest of his web site, and if you spot any dubious items contact the FBI Art Crimes squad.