How long have you been using the phone?
I've had it for about 9 months
I heard that the iphone 6 had a lot of software bugs. When is apple going to fix them?
I don't know anything at all about that. I've never had a problem with this phone, just wanted to upgrade to a 6s
Okay, what about the battery life?
It works just like as new. No problem waiting until the end of the day to charge it up.
Alright. I am willing to pay $125 for it to buy it now. 
I can't go that low. I was looking for $320, but I'd be willing to lower my price to $280
I am not going to go that high for an out of date phone. If you went me to pay anymore you will have to throw in something else with the deal. Apple is terrible with supporting older products.
How about this, I'll drop the price to $200. It's worth that much and uh, I can throw in a backup charger.
I'll take it with the backup charger for $185.
I can't do it.
I am not willing to pay anymore. Take it or leave it.
You're going to miss out on a great phone for the price. I could go $190 but that's as low as I'll go.
Alright. I will take it for $190.
deal.