Hello. Are you interested in the bike?
Hello, I see you are selling a bike?
Yes I am. 
How long have you had it?
I had it for about a year but hardly used it, because my daughter outgrew very quickly, and it was for her actually. 
Was it ever taken to the Mountains?
No only used it on the streets
That's a plus.  Did your daughter ever have an accident or fall off of the bike?
No thankfully she did not!
Excellent! If you don't mind me asking, how much did you originally pay for it?
I had originally got it for $200 but I am now selling it for half the price
I see.  I like the bike. It seems like a good deal, but I am very hesitant to pay $100 for it when it is a year old.  Is there any wiggle room on that price?
I could bring it down to $90 that's about it because its not very old. 
$90 pretty good, but I was thinking more along the lines of $80.  Maybe we can meet in the middle at $85?
I can do $90 and that's about it 
You drive a hard bargain.  Are you getting a lot of offers for it?
Yes I am. But I am willing to give it to you for $90. Are you interested?
Since you did come down a bit, I guess I could tighten my belt at $90.