Looks like the reports that the girls have been sold were wrong and probably a ploy to take the attention away from Borno.
According to VANGUARD, Sources in Abuja said that members of the United States Marines who are already in Maiduguri located the girls inside the forest, using some Satellite equipment which combed the forest, located an assembly of the young girls and sent the images back to the Marines on ground in Maiduguri.