Amazon offers Prime members Escape From Planet Earth on 3D Blu-ray / Blu-ray / DVD for $4.75 with free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping adds $4.98.) That's $3 under our mention from last June and the lowest total price we could find now by $5, except for the mention below. (It's also the best deal we've seen.) It includes digital and Ultraviolet copies of the film.

Of note: Target has it for the same price with in-store pickup only with limited stock varying by ZIP code.