Hello there, are you interested int he iphone?
Hello! Yes! I would love to get this phone
I'm only asking 200 for it
My son really wants this for his birthday. I just recently got divorced and wanted to get this for him are you willing to accept anything lower?
Seeing as it is used, I can go to 180 if that makes it easier for you? It is unlocked...
I am not sure what unlocked means I just want to get this for my son. 
It can be used by an mobile carrier, you aren't locked into using only one. I can do $160 since it's for your son.
Oh I see. Thank you for that information! That does seem like a good deal. Would you accept 140 and I will come pick it up
$150 and you got it!
your breaking my wallet but my son is worth it. Deal!