Commercial Quality 8 capacity Monitor mount

Hi there, I have a very large heavy duty Monitor and I'm trying to figure out how much it is worth. I have no interest in using that many monitors so selling it would be ideal, right now it just sits in my closet. My father gave it to me and I have no idea what it is worth so I decided posting here would be my best option. Just looking for somebody to give me a number or share a similar product page or something. i do not see a brand name anywhere on it. @wendell you seem to be the guy to ask about this.

Thank you