The Islamic State (ISIS) apparently is now using social media to sell captured girls and women online in another possible indication of the terrorist group's financial woes brought about by the sustained military operation of anti-ISIS forces.

The photo of a woman around 18 years of age, "with olive skin and dark bangs that droop onto her face'' was posted last May 20 on Facebook with a caption: "She is for sale,'' the Washington Post reports.

"To all the bros thinking about buying a slave, this one is $8,000," says Abu Assad Almani, who attributes himself as an ISIS fighter, according to the report.

The same man posted a second image showing "a pale young face with weepy red eyes'' with a caption: "Another sabiyah [slave], also about $8,000. Yay, or nay?"

"What makes her worth that price? Does she have an exceptional skill?" one correspondent asks about the second woman, the Post reports.

"Nope," Almani answers. "Supply and demand makes her that price."

The photos have been taken down by Facebook.

Social media sites recently used by ISIS fighters have included "numerous" accounts of the buying and selling of sex slaves, as well rules for how to deal with them, according to the Post.

But the May 20 Facebook posting is the first instance of pictures being used in the sale of sex slaves, it adds.

The organization Human Rights Watch, citing estimates by Kurdish officials in Iraq and Syria, says ISIS holds about 1,800 women and girls, just from the capture of Yazidi towns alone, according to the Post.

"The longer they are held by ISIS, the more horrific life becomes for Yazidi women, bought and sold, brutally raped, their children torn from them," Skye Wheeler of Human Rights Watch tells the Post.

Meanwhile, an ISIS militant who was filmed two years ago bragging about buying ''green and blue-eyed'' slave girls has been captured by Iraqi Kurd forces, reports the Mirror.

In the video footage that was reportedly taped in 2014, the ISIS fighter is seen negotiating the price of Yazidi girls with traders, and bragging about paying $500 for those blue-eyed girls who are 15-years old.

Reports say that ISIS members usually sell girls and women in exchange for a Glock pistol. Buyers are apparently willing to pay depending on the looks and if the girl, upon verification, is to their liking.