Humble Bundle has a sale on Elite Dangerous for 33% off the game and DLC.
Commander Deluxe Edition – $40.19 – Contains the base game, horizons season pass (a DLC expansion), and the commander pack (a cosmetic DLC).
Elite Dangerous base game – $20.09 – The original game.
Horizons Season Pass – $20.09 – Expansion pack DLC; requires the base game.