I'm surprised no one has mentioned the resin dragon from Heresy. It's still being cast up for back orders, but it's HUGE.
I would steer clear of this dragon until he has filled the 214 backorders. He is currently averaging 17 dragons every two months and at this rate it will take 26 months to clear the 214 fully paid backorders. You can see his discussion on why he can not fulfill the backorders on the Forum of Doom.