Hi there, great looking bike!
this is a rare antique bicycle with an unique history and I have its documentation. you can get this cool 3 speed collectors item for an easy price of $250
Yeah, it looks nice.  Does it come with anything else?
its a rare vintage color (purple) and I have it certified by the antique dealers of america. its 65 years old, and a great addition to any antique bike enthusiast. 
sounds good.  I can offer you 140 for it?
if you come and pick it up, i can let it go for $210
hmmm...still tough for me.  I don't really need the locking fork, wo that can you meet me at 150?
tell you what. I will drop the bike off to you. the locking fork and key come for free. $200 final offer.
well, that's real nice of you!  If you meet me at 190 im game :)
done