Hello you are interested in the Iphone case? 
I am! Is it used or in original packaging?
It is a new opened package.  I originally bought it for my phone and discovered it was for the 6 or 6s and I currently have the 7
Oh ok. Since it's been opened I'm willing to pay $12 
That is really much lower than I can go.  Originally paid $30 for it and never did put it on my phone.  The lowest I could go is $15
Ok, $15 works. Sold!