Walmart offers the Ninja Professional Blender with Two Nutri Ninja Single-Serve Cups, model no. BL660, for $82.39 with free shipping. (Amazon charges the same.) That's an $18 overnight drop, $11 below our May mention, and the lowest total price we've seen. This 1,100-watt blender features a 72-oz. blending jar, single-serve function, and two 16-oz. cups with to-go lids.