I have the cheapie Walmart version of the Magic Bullet. I had to return the first one because it broke, but the second one has lasted over a year and it works fine. Fruit smoothies and whipping air into eggs for scrambled eggs are what I use it for most. For green smoothies, I use a regular blender, but mostly because when I make green smoothies, I make a larger quantity.
It cost $18.99. Not sure what the original Magic Bullet sells for.