The general topic of concern already has been raised by the United Nations Office on Drugs and Crime, which found, “In 2011, it was estimated that the illicit ‘organ trade’ generated illegal profits between $600 million and $1.2 billion per year. Underground ‘organ markets’ present a significant threat to the security of national organ donation systems, eroding the image of transplantation and public confidence in organ transplantation worldwide.”
Unaccounted for people seem to be fair game to be "harvested" and illegal organs are not cheap, so those that can pay, do. Sick, sick, sick.