I don’t think you can sell the right to yourself - you are merely playing with the definition of selling. To own implies you can do as you please but this is not the case with life. No one can own other life -but can obvious exert control over it.
In terms of non-life property, humans have always had to right to enforce theirs with violence and have done so since the age of dawn. Luckily we got some legal rails in place and violence is no longer necessary but even today that doesn’t stop people from forcefully taking property. Heck, there’s eminent domain.
I guess you could say nothing can truly be owned other than your own body.