Hi, this looks like a great bike.  Would you sell for $160?
That's because it is a great bike. But I'm afraid I can't go any lower than $180. I just had the tires and chain replaced and those set me back at least $50. 
I can do $180 if you throw in a helmet and lock.  Deal?
If that's the case, I'll just throw it at you for $170. I have neither of those things. 
Well do you have any bike equipment.  I have a basic budget, so I was looking to see what things I might not have to buy if I could get them from you.
I'm afraid not.