Amazon offers Prime members the Valve Steam Controller bundled with a Carrying Case for $34.99 with free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $5.57.) That's the lowest total price we could find for these items sold separately elsewhere by $20. (For further comparison, we last saw the controller alone for the same price in September.) The controller is compatible with Windows, Linux, Mac OS, and Steam OS.