The captured jihadi, named as Abu Al-Mughaira Al-Muhajer, told Memri TV that IS fighters are 'given' Christian and Yazidi women as rewards for good behaviour.
The militant said: "Whenever they took captives, they would bring slave girls, and they would place them on the slave market in Raqqa.
"Afterwards, they would sell them for dollars. Their price would range from £190 to £420 ($250 to $550).
"The Islamic State would buy slave girls and give them as rewards."
Abu Al-Muhajer was given three women himself for alerting Islamic State that his brother was planning to leave the group.
He added: "They told me that the girl from Damascus was a Yazidi and that the two girls from Homs were Christians.
"All of them had been beaten on their backs.
"They told me that they had been captured, but it turns out they were wives of FSA fighters from the Islamic Front."
