If selling organs could save thousands(according to the author), is the view by some that the practice is immoral justification to keep it illegal?

Although many people die every year from kidney disease and waiting on a list to recieve a kidney, the author's arguments are not sufficient to persuade me to make the sale and purchase of kidneys legal. There is a line of people waiting for kidneys and that author says the people will do anything to stay alive. People who are affected by kidney disease includes people from every background: rich and poor. If kidneys became purchasable, the people waiting in line for kidneys that are not as fiscally blessed as others would suffer. Kidney transplant would be controlled by who has the most money. The author argues that it will reward people who would donate the kidneys anyway. If this becomes true then there would be no more donations and the poor would be swept aside to die and suffer. Every choice has a pro and con, but from the author's argument I feel as if the cons outweigh the pros.