Okay, I know that nothing in the premium line is exactly cheap, but the new Axis & Allied aircraft seem particularly expensive at $100 each.
The SSU helicopters are also $100 each, but the Ground Attack version comes with a bunch of diferent weapon loadouts, the Airborne Transport comes with a whole infantry squad, and the Walker Transport comes with a walker with three diferent weapon configurations.
As far as I can tell, the Axis & Allied planes don't come with any of those bonuses.