Topic No spin intended
You really -really- don't want to do that.
Not only will you have wasted your money, but you'll also lose the panther and your account. Trading in game items for anything out of the game is just, yeah it's not good.
In game item/service for in game currency/service = okay
In game item/service for out of game currency/service = not okay
You can't put any spin on it either. You can't say 'gift' a person game time and then they 'give' you the panther. Blizzard will slap you down hard.