Back To The Future’s 30th anniversary trilogy pack includes all three movies (complete with bonus features on each disc), plus two complete bonus discs full of mini documentaries and behind the scenes footage. At $20 on Blu-ray (or $15 on DVD), it’s also never been cheaper, and we’d need a DeLorean to know how long it’ll be until it’s on sale again.
Source: io9 – This Back to the Future Trilogy Set Is Packed Full of Bonus Features