In my opinion, if they have a dead body and no family is known, I don't think it would be so bad to donate the organs without permission. For one, the person is already dead anyways and two, there is no family to oppose it.
If that person's organs are healthy and can save a life, I don't see why not.
i think its a good idea to sell organs there are alot of good reason for it
one being the money from the selling of organs can help you out
with money problems, here is a link to a site to suport why i
belive selling organs is a good thing. Organ Selling Website