As a reader discovered, Amazon offers its Prime members the Valve Steam Controller bundled with the Valve Steam Controller Carrying Case for $34.99 with free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $5.97.) That's tied with our mention from last month, a current best for these items by $12, and the lowest total price we've seen for this controller. (The controller alone usually costs $50.) It's compatible with Windows, Linux, Mac OS, and Steam OS.
Orders placed today (December 22) using Prime are expected to arrive by Christmas. (Cut-off times vary by location.)