Of which there are none...
For example, this week I found out that all church bake sales are illegal, all providing of food for transactions of any form in which you have not purchased a permit to do so is illegal. Even the one's who work for the state department of health will attend these events and ignore the laws, in fact most people don't think it should be illegal. But it remains so (partly because there is such lax enforcement of the law).
You will find very few people who will obey the law just because it is the law. Perhaps they do it to avoid punishment, but all punishment is is a really high cost. That organ you just bought cost you $XXXXX and a chance of spending X years in jail. They do not make it effectively nothing, they raise the price till almost no one can afford it. Of course, because jail time is paid via time and not money, this is one price that actually is based on your earning potential (not to mention sentimental value such as time spent with family).
Due to the nature of the good in question though, there are people who are willing to spend a lot to get it (some people will do anything to live longer). As such, raising the price this high opens up a very dangerous black market (other people will do almost anything to get money from the first people), albeit the size is somewhat limited.