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.
“turn the volume to infinite” this right here is what he was talking about