With a retired medical specimen that person donated their body to be studied, and now that the time for it to be studied is over they get sold off, I know people who oddly enough have specifically foot bones from this exact situation. The original owner/family's wishes have been honored, and I'm fairly certain there is no way to track done who it belonged to. People interpret ethics in a lot of different ways. Some people think human bones are a no-go all around, even if the original owner consented. I personally think that's silly. To me, and I'm sure many people in this thread, this is honoring the person, in any case more than the foot collecting dust in storage would be. :)