Hello, I'm interested in your bike, can you tell me more about it?
Sweet! Its lightly used, great condition. It's a womens bike, and works very well for me and im 5'4. $150 for it, its a great deal!
I'd like to bring the price down, just a little bit. 
I can drop the price to $120 if you can come by my house and pick it up. Btw it also comes with a free U-lock.
That sounds nice, but how about $110? 
Okay fine. You're coming to pick it up though, correct?