Review on National Optical 40X-1000X Compound Microscope Set: Ideal for Students & Kids in Biology – Cordless & All Metal Construction with Slides – A Perfect Beginner Microscope by Eric Avina

I believe I was also used or returned. There are scratches and dust. They don't seem to want to be strict on quality control, although there have been some complaints about this. In terms of function, I found the 25x eyepiece didn't work as well as the 10x eyepiece. It's kind of blurry and dark. They seem to be of different quality. You can even tell by the imprint on the parts. However, it works well with a 10x eyepiece. I will either replace or ask for a partial refund due to not getting a new one and for the poor quality of the 25x piece.