Is There a Market for Kidneys?

If the government sets a price for kidney transplants, there will be an excess of potential donors. The quality of the match will be higher than it is right? Now won't a market then emerge that's not regulated by the government, some kind of black market? Because all these people are clearly willing to get paid to donate a kidney, and maybe they'll sell kidney for a lower price. And you're still going to get into the issues of people getting taken advantage of for selling their kidneys for cheaper than they so what's your response to all thisye?"