Discovery Store has the When We Left Earth, The NASA Missions DVD Set for $45 - $5 with coupon code EML2008 + $4 shipping = $44 shipped. The Blu-Ray edition is $59 after coupon, and best captures the awe-inspiring imagery of the early space era. "Commemorate NASA's 50th anniversary with this stunning high-definition series chronicling the inside story of the space agency's epic endeavors."