Amazon offers its Prime members Dredd on 3D Blu-ray for $8 with free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise it costs $3.98.) That's $5 under our July mention and the lowest total price we could find by $12, outside of the close price below. It includes a 3D Blu-ray version, UltraViolet, and digital copy.
A close price: Target has it for the same price with orders of $50 or more; otherwise, shipping adds $2.79. (It's also available in stores.)