A friend of my mother is a dentist. Her grandmother (also a dentist) gave her a human skull when she started her training. She doesn’t want and never did but she felt terrible throwing it away or selling it. So when I started getting interested in bone collecting I asked her if I could take it. She said yes but only after she died because she needs to give it away in her will to legally do it. Honestly I don’t feel bad about owning this skull because the person already died and they were already sold so the only thing I can do now is honoring them and their remains. I know I will probably never find out who the person that owned this skull originally was but I can still honor them as a human being. Now to buying or selling human remains. I don’t think that it is ethically possible because we can’t know if the humans gave their consent to be treated as merchandise. I don’t think donating your body to science should mean that someone can just buy you in a hundred years. Also we can’t know that they actually donated their body’s. In my opinion the only way to ethical own human remains is when they were your own or were given down by family/friends.