An immersion blender, it was $30 but it made my soups seem gourmet and let me recycle my gallons of lard into the best soap I have ever used.
Aside from that, I replaced two of my mismatched odd shaped PC monitors with 27" 4k monitors and the difference is amazing. The monitors were so cheap too only $110 each. Together with my super fancy main screens it really cleaned up the desktop.
These things rock. Making cream of {ingredient} soup is so easy. In fact, making soups out of everything is notmw so easy, and I use more food that might otherwise be wasted. If you have stale bread, you can blend it in stock or water to easily thicken a soup, and nobody else will know there's bread in it.
I used my Vitamix to make a “Chicken Caesar Smoothie” by blending the ingredients of a chicken Caesar salad, topping with some crushed croutons, and garnished with a large romaine leaf.
People were rightly disgusted, but when they tried it they had to begrudgingly admit that it was delicious.
I was able to make them feel better about themselves by telling them to think of it as soup in a glass rather than a smoothie.