Bests & Worsts Reviews from Amazon

I've been looking for something like this for years. I don't know if my failure to find such a powerful magnifying lens has been my fault, or if such lenses have only recently become available, but this is what I've been searching for. Is it a 30 power lens? I don't know, but it's as powerful as I have hoped for, and as powerful as I need. Furthermore, it's magnification is for the entire 3"+ lens, not for a tiny sub-lens. Too heavy? What a silly comment. The only thing about it that might be too much--not for me-- is the lighting system. It uses two AA batteries to produce more light than is really needed, but I'm not complaining. Everything considered, it's just what I needed. The only thing that puzzles me is that there are several other 30-power magnifying glasses for sale here. They might even be better, but I'm not going to investigate. I'm just wondering where all of these lenses have been all these years. Have I been blind?