Hello! Interested in buying Sally?
Yes, I did not see the mileage listed on the ad. What is it?
48,000 
I think that is very low for the age of the car but fair considering the price. My budget cannot handle quite the asking price. Are you open to accepting anything lower if I agree to pay cash?
If you can meet up today and pay in cash the lowest I am willing to accept would be $4000.00
I think that is a fair offer and could meet up today, but would you be able to supply a Carfax report? I only ask because you named the car and it seems you have owned it a long time. 
I could definatly provide a Carfax report for Sally! And she was great to me. I didn't use her much as I was on tour in Korea for a bit and now that I am back I have some fun money and plan on buying a better Sally!
Okay. Sounds great! I would be willing to meet up today and pay a higher price of $4410 if you could provide a full tank of gas and allow me to have a short test drive. i would also like to allow a mechanic at a local shop to inspect it while on the test drive. You can accompany me, of course.
I really need the $4000.00 for a down payment i really can't take any less. Not only that I can provide you the papers showing all the work that was done recently.
I offered $4410.
I am a man of my word and can only accept what I offered man. You have been too good to me. 
Okay. Done Deal. $4000 it is!