Hello
Hi, I'm interested in your phone. 
Great. 
Do you think you could sell it for 120?
Well I don't think I could go that low. The phone does work perfectly and it comes with a case and charger.
Well, it has a small crack in it.  I don't think I can go higher than 150
Yeah but it is a very small crack, and it is on the bottom so it doesn't obscure anything. I could go $150 if you can pick it up right away.
Sounds good