Little new here in the last several hundred years, simply under reported.
According to the report, the underground black market is based in the Turkish town of Gaziantep, close to the Turkish-Syrian border.
"IS [Islamic State or ISIS] offers women and underage children in a kind of virtual slave market with for-sale photos. ... The transfer of money, as the reporter discovered, takes place through a liaison office in Turkey," reports German station NDR (NDR is part of the German ARD media consortium).
The sale of the girls and women follows a sort of auction pattern, with the highest bidder winning. According to the reports, prices for the women can go as high as $15,000 to $20,000 each. After bidding, the money is transferred through middle men in Turkey, eventually reaching ISIS coffers.