Are you asking if that is a good price??
Is this a third party sale??
If so I would say unless you know the person you are buying from very well, I would not buy it. If I knew what I know now I would have bought the "Progressive 50amp surge protector". Progressive is made in the USA and has a better warranty..I currently own a "Surge Guard 50amp" and it does the job, but if the occation would ever arrise that I would need to buy another it would be a PROGRESSIVE..