Kmart has NutriBullet 900 series on sale for $73.94 + $20 cashback in points.
Note: Sale price is $82.16, there's a promotion for extra 10% off (-$8.22) applied automatically for home purchase (EXP: May 01)
This is effectively $53.94 if you take account the points. Lowest price from Amazon is $70.57 accord to CamelCamelCamel, but it's a 13 pieces set instead of 9 pieces set from Kmart.
You can apply additional FREECASH coupon to sweeten the deal (YMMV)