Amazon offers its Prime members this Avatar Limited Edition 3D Combo Pack on Blu-ray / DVD
with free shipping
. (Non-members can spend $25 or more to get free shipping; otherwise it adds $2.98.) That's the lowest total price we could find by $7, outside the price below. (For further comparison, we saw it for $3 less during Black Friday weekend.) Sales tax is added where applicable. This edition includes 3D Blu-ray, 2D Blu-ray, and DVD versions of the film.
Of note, although Best Buy lists it for the same price, it's unclear whether it's actually the combo pack or just the 3D Blu-ray.