C'mon, @tenderloin , you did haggle. Otherwise, why would you share what you are willing to pay after he told you his price? There is nothing wrong with haggling, in my opinion. You just have to do it well.
I know that most of you are anti haggling. But to me it is not a red flag per se. It depends on the context. In this particular situation, if tenderloin's transcript is accurate, the red flag comes with the urgency to meet.