Right now as a gold box special Amazon has a Thriller Pack for only $39.95. The pack includes The Sixth Sense with Bruce Willis, Unbreakable with Bruce Willis and Samuel L. Jackson, Signs starring Mel Gibson, and The Invisible. Check out the link below!
Purchase Blu-ray 4-Pack: Thrillers (The Invisible / The Sixth Sense / Signs / Unbreakable) [Blu-ray]