NOTHING can match the quality of the OEM rotor and stator.
But the description SCREAMS "brushes". Worn to a nub and thensome.
A "new" chinese alternator isn't an ND.
I would source new brushes and both bearings. The slip ring end bearing you can cheat with but not the drive end bearing. Take a fine point pick and pry the plastic seal off. Carefully insert aboit half a pencil eraser's worth of grease. Don't stuff it. Snap the seal back on.
Brushes use a pin to retain them depressed until the back half of the alternator is bolted to the drive end. I straighten a paper clip in a pinch. Certainly do not be intimidated to do this yourself.
Remember the outer winding - the stator - stays with the REAR half of the alternator.