Hello you are interested in the leather couch? 
I am.  What kind of condition is it in?  Any rips or tears?
No, I would not be parting with it if it wasn't for the fact that it doesn't fit in my new place. 
i see your asking $500.  I really can't pay no more than $450.  Would you be willing to part with it for $450?  Looks like it's in good shape.
It is in great shape. Being that it is four pieces the lowest I could go is $475
what if I pick it up myself?  Then you wouldn't have to worry about moving it.  I will even bring someone with me to help carry it out of the house.  You won't have to lift a finger.
In that case I would take $450
Great!  I'll take it!!