[xherberta]

There's only one place I'm aware of on earth where organs can be sold: Iran. Here's an interview with an economist who helped set up that market, which does seem to function fairly efficiently and has some safeguards in place to prevent coersion.

http://www.econtalk.org/archives/2015/09/tina_rosenberg.html

Edit: specifically, this is about kidney donation from living donors, not after-death donation.