Hello
I'm somewhat interested in your product. Can you give me some more information on it?
It is an IPhone 7 brand new 
Would you be able to meet so I can make sure it's in good working order? 
Absolutely! I  can still see the features of it.
Great, is your price negotiable? 
Originally it lists for $600. I am open to offers
Im looking to spend around $300.00.
That is low for a brand new IPhone 7. I can't go that low. I can accept $500.00.
That sounds fair, I can do $500.00 as long as we meet before and test out the phone.