Hi there. 
how we doing today
Good thanks. How can I help you?
i am really intereted in your bike, however, I do have some financial problems at the moment
I am willing to negotiate but I can't go lower than what I have to. This bike is the best thing that I have had and its quality is just too amazing!
ok so how about 600 and everyone goes home happy
that's too low for what you're getting in return. I can do $800 
how about 700 hundred and I ll stop by and pick it up ASAP, come on
Okay if you are insisting that much then I will take the 700 but you need to come by latest tomorrow.
sounds great to me, I will see you then, so let finalize ok