PIMAX 8K?

Someone told me they are selling their Pimax 8k they never used for only 300 bucks. The FOV and res look good but I have no experince with the brand and keep reading bad things. Are they hard to get working? Uncomfortable? Idk I keep holding off on an upgrade but seemed cheap from my VP1. Also why does pimax have like 50 headsets sometimes I realize I just read a review on a different one lol