Originally ONLY available only to backers of the What We Left Behind Documentary project this was the double set Region Free DVD and Blu-Ray of the documentary. The Blu-ray is different than the retail version in that the retail version has a longer cut of the round table discussions in the extras.
This edition is now out of print.
Does it make it rare? Will it be a future collectible? Only time will tell but get your copy today as quantities are limited.