The price isn't that fantastic at this point but could drop before the movie
is released but Amazon.com are offer a $5 coupon if you pre-order the
following:
Tron: Legacy (Four-Disc Combo: Blu-ray 3D / Blu-ray / DVD / Digital Copy): http://www.amazon.com/Tron-Legacy-Four-Disc-Blu-ray-Digital/dp/
for $34.99
or the Tron: Legacy (Five-Disc Combo Blu-ray 3D / Blu-ray / DVD / Digital
Copy + Tron: The Original Classic Special Edition Blu-ray): http://www.amazon.com/Tron-Five-Disc-Blu-ray-Digital-Original/d
for $55.99