I’m of the opinion that someone should sell their kidney, because there are two different benefits to selling.
     Firstly, donating or selling kidney help people perfectly suffer from kidney disfunction. As you know, we have two kidneys in own body and common people can live only one kidney. This is the same to the recipient.
     Secondly, selling kidney help donor in aspect of finance. Most of donors are in developing country and their income is very few compared with developed country. Kidney is sold at around some years of their income.
     Of course there are cons about selling kidney. One is that poor countries have no choice but sacrifice citizens health in exchange for money. In addition, people who need kidney in the same country to donor may be difficult to receive kidney. Even they live in the same town, because recipient have no money to buy it.
     But it is rule of capitalism. Almost all of us cannot live without money. So we should accept the dealing.
     In conclusion, dealing kidney from poor healthy people to sick people who have much money benefit each side. In another words, all of the deling consists on mutual agreement.