Kept the discs, sold off the Steelbook packaging, and threw in my DVDs of the 6-hour TV miniseries cut with additional special features to make my own 4-disc set.
I really love that Sony Home Video continues releasing Blu-ray + DVD combo packs. I purchased this combo pack for $9.99. I sold off the 3D blu-ray disc (not interested) for $5, the DVD of the film (no need) for $3.50 and the digital copy activation code (I don't stream!) for another $3. I kept the 2D blu-ray (the only disc I want or need) for myself. PLUS the case had a Movie Cash offer for $7.50 towards the ticket price of Pixels. I'd say that was a deal... for me, at least.