Target offers the Ninja Master Prep Professional, model no. QB1000, for $27 with free shipping. (Amazon charges the same with free shipping for Prime members.) That's $10 under our July mention and the lowest total price we've seen. (It's a current low by $12, excluding the below mention.) It features 6-blade technology, an interchangeable 450-watt motor head, pulse function, and non-slip bottom. The blender comes with a 16-oz. chopper bowl, 48-oz. pitcher, and two storage lids. Deal ends November 28.
A close price: Blinq has it for $27.69 with free shipping. (Search for "QB1000" to see this listing if needed.)