This looks nice but the price seems a bit high. 
Yes definitely but its pricey because of its quality. 
Are the tires full or flat?
they're full and in great condition
Then I would like to offer you 180 for this
well, how about $190?
If you have a helmet I'd be able to do 190
I can definitely provide you a helmet. What color preferences do you have? 
I'd love a blue or green one. 
Sure thing then you will get either of the two colors. So do we meet up tomorrow to finish the deal?
Sounds good to me. $190, tomorrow.
See you then!