We recently created a "do not trade" list that includes Mini Tyrael. Because transactions involving such rare pets such as Mini Tyrael are so controversial, I will be locking this thread. Thank you for your understanding!
For more information on which pets are not allowed to be traded on the WarcraftPets Forums, please see our Official Do Not Trade List.
Feel free to browse through Perks N Peeves, my vanity pet collecting blog!