I saw that the unicorn baby had sold for as high as $550. Try Ebay and have people bid for it.
It seems like the prices for them jump around a rediculous ammount. Where can you sell them for the most ammount of money?
I spent half an hour writing about the value of mystic... I suppose you should look at it:q471842.html
Barry's Beanies website is selling Mystic for $3.99.