That's a cool bike!
Thanks! It's a classic. There aren't that many around anymore which makes it a collectible! Are you interested in buying it.
Yeah, but I don't know if I can afford $200 for it.  
Throw me an offer and we'll meet half way
I could probably do $75
That's a little low. How about 150 and I can bring it to you.
How about $125, and I can pick it up?
135$ and we've got a deal!