Hi, I am interested in the bike you are selling. How old is it?
Looking for $90 out of the bike.  2 yrs old
Well, I was hoping to pay less...since I will need a new chain and such, will you take $40?
i'd realistically be at about $65 as my bottom dollar.  
Okay, $65 sounds reasonable.I'll take it.
Sounds great.  thanks