or they were 'legally' sold but the seller is a moron who didn't know about how the management thing works. I have a friend who worked at a school that used that same system for school owned and issued iPads. when they upgraded to a newer model the principal gave him the okay to sell the old ones to graduating students but the principal didn't know how the system worked cause he never asked the outgoing IT guy (my friend was the replacement who hadn't yet bothered to read the notes the old guy had written about what was being used)