Looking at the reviews on amazon, there are poor reviews for everything at every price point.
I spent £15 on a 12″ table top fan, with plenty of 5 star reviews and the standard wodge of 1 star reviews.
Built it up, turned it on, and it vibrated like crazy; really loud, looked like it was shaking itself to death. Obviously the fan blade was unbalanced. I figured at that price, it’s just down to moulding tolerances and material weight, and a replacement might be just as bad or worse, so I experimented with dabs of blu tac on the back of the blades.
2nd try, with a 5p sized dab on each blade, it was quiet and smooth, and I didn’t have to go to the post office with a big box. 😀