I may say "there is some room" or " i am firm on that price" depending on what it is i am selling.
I do not like a "previewing" offer . But IF you can get me to commit to it, the haggling is done. show up with the money and it is yours. I will demonstrate that it is everything i said it was but DO NOT start to renegotiate. If you made a blind offer, and i accepted it, further haggling is out of the question.