Hello
Hi. Are you interested in the sofa set?
i am interested in the sofa set. Is it in good condition?
It is in great condition! It really has not been used. 
Great. Are you flexible on price? I'd like to offer 650.
Well, given that it is practically brand new I was looking for more around 1000 for the set. It is a bargain. I can throw in delivery. 
How about 800?
I can do 900.