In the market place mostly modern countries put banned on the trading of human organs. Which people are most likely to be capable to get the organs that they need and why?
Still at a price of zero there are likely to be several eager customers without the corresponding number of organs obtainable. Making them obtainable for sale in the market might actually reduce the shortage. The difficulty in applying this fundamental economic principle is that we do not, as a society, consider human organs to be commodity which can be bought and sold.