To really get rid of the shortage of organs, allow people to freely buy and sell them. Murder (and other initiations of force) is both immoral and illegal, so

To really get rid of the shortage of organs, allow people to freely buy and sell them. Murder (and other initiations of force) is both immoral and illegal, so there's no conflict there - you need your organs to live, so these laws (and many others) already criminalize the theft of organs. There's no valid reason that you or your estate shouldn't be allowed freely sell things you don't need anymore, including your liver.