FB Marketplace embody gaming chair

Hello, I found a FB marketplace listing of a guy selling the embody gaming chair for local pickup. I negotiated with him down to $1100. It is brand new in box. What questions should I ask him? Do you guys know if this still comes with the 13 yea warranty if I buy from him, or would that be only if I bought through Herman Miller website? I am thinking this is a pretty good deal, but what should I be aware of before buying? If I hand over the cash and take the chair home then I am stuck with it, and cant do anything if there is anything wrong with it right? Good idea? bad idea?