Hello!  Can you tell me the mileage on this truck?
65,000 miles.  It's in excellent condition!
Looks great!  Would you be willing to take $10000 if I come see it?
Oh my!  10K is way lower than I would think about.  This car is in great working order- it's been well taken care of.  I have to stick with my original offer
I understand.  How about $11,000 cash -- out the door!!  
I'm sorry.  That
What is the lowest you'll take?
The lowest I would consider is $16000.
That's way more than I wanted to pay.  It's almost 10 years old. While it's a great car, I wouldn't pay more than $12,500.
I can go down to $15000.  But, that is way lower than what I was willing to do originally.
How about we settle at $14,000.  You'll have cash in hand and I'll have a new car.
$14500 and you have a deal.