So what? That's up to them. People who buy organs are paying a fair price. Why do you want to infantalize poor people by denying them the opportunity to participate in the market?
By ignoring the reality of the situation you create a demand for people to cause severe risks to their health for short term problems, preying on the least educated group of people who have a severe information asymmetry... You also crowd out an altruistic source as it no longer becomes a societal issue but rather an economic one.
You also create an unnecessary class problem as middle and upper class people have access to organs, but not poor people who are the actual source of supply...
