Funny enough, these MEMBERS ONLY playing cards from The Magic Castle (The Academy of Magical Arts) in Los Angeles can be bought by any person online. Each deck is $10.
Visiting The Magic Castle in Los Angeles
I've always wanted to go to The Magic Castle, but from what I hear, it's pretty exclusive and short of being a magician yourself, the only way in is to know a card-carrying member. I don't know any person with a membership card to this place. So I guess this is the closest I'll ever get to going inside. Thanks Zagat!