I quite agree that only a sick-minded individual would be okay with a 7 year old being sold as a sex-slave (or someone of any age for that matter). Any moral code that failed to recognise this as wrong would be inadequate, however I don't accept it as an absolute.

Property is a man-made concept, and I think it is a very important and valuable one, but it isn't a part of nature, and therefore violations of property rights are still not absolutely immoral.