I'm interested in the bike you advertised.
Great. This bike is a classic but needs work. I'm asking $60 for it.
That's a little more than I can pay right now.  Would you be willing to take $40?
I'm sorry, but this bike is worth way more than that. I can come down a little bit to help you out. How about $55?
Can you throw in a bike lock and helmet?  Used or not?
I do have a helmet you can have. I never fell off so it's scratch free. Are we good for $55?