Hello there are you interested in buying this bike?
yes i like to buy this bike
I'm offering it for 550 and it is in excellent condition
man this price is too much for this item
Well how much were you thinking?
i thinking to but it around 400 to 430 
How about more like 450?
i dont have much how about 430 we can finalize it
Could you pay today?
cash in hand
Deal. 
thank bro