I never made a deal with this person, I believe they were just confused and thought leaving the feedback was how you respond to a thread. If you check their other feedback left, same thing with many other people where they just offer their account for sale but in the form of feedback instead of a response to the thread.
https://www.epicnpc.com/feedback/feedback/751270/view
https://www.epicnpc.com/feedback/feedback/751270/view
