Saw the NutriBullet 12 Piece Set 600 Watts (NBR-1207M) at Target priced at $119, but you can essentially save $56 off the average market price on one of these by adding an extra $6 worth of stuff to your car. This would enable you to use Target's $25 off promo code (on orders over $125).
So basically I think it makes sense to pick up some bottles - i.e. get two of the 700ml ones which are priced at $3 each with the NutriBullet set, bringing the total to $125. Apply the $25 off promo code and your total will drop to just $100 with free delivery for the blender and 2 drink bottles.
The blender on its own is priced between $135 and $170 delivered at Harvey Norman, Joyce Mayne, The Good Guys, David Jones, Big W, Myer and Harris Scarfe - on average $150 vs. Target's $100 tag with two "bonus" bottles.
If you deduct the value of the bottles you're looking at a total of $94 for the blender which, another way of looking at it, is a saving of over 35% off the average market price.