How do you buy a unicorn
How do you buy a unicorn
Lots of different people will sell you lots of different kinds of unicorns in lots of different ways BUT unicorns have never been domesticated and usually do not readily submit to 'activities' that are usually associated with ownership. So if somebody 'sells' you the rights to a particular unicorn you can claim ownership and brag about it but that's about all you can do. The unicorn will probably just carry-on as if it is a free agent.
improved answer: We all know you can buy them at the Unicorn store.