Hello, I am interested in this iphone and wanted to know about your acceptable price.
I have it listed as 95 firm, and feel that's more than a fair price.
I thought of a budget upto $50. Further got attracted by this iphone.
No.  I'm sorry there is no way I can take 50 for it.  
can you elaborate the other features this iphone has..?
You do see, correct that these are two phones?  One is iphone 5 and other 4.  What specific features are you looking for?  They are iphones, so do pretty much everything.
are you sure that the physical damage is a minor one..? whether it will affect the performance?
It has not seemed to affect performance.  And only the 5 has some physical damage.
okay. shall we make it for $60. I will adjust my budget somehow..
No.  I can't go that low.  
how much can you come down from $95?
I cannot and will not go lower than 85
Let it be for both of us to down & up. Finalize for $65.
I won't go lower than 85.  Sorry
Last deal for $70, because I like these iphones very much.
70 will not work for me
Okay. Then I'll have to quit and look for some other phones.
I understand.  I am willing to  go half way between with you.  But, seriously, that is all I can do.  What if we split the difference and go 77 for both phones.