My granddaughter would like this little bike. Will you take $18 for it?
Sorry, the bike is in really good condition. I would consider $30
How about $22 with the training wheels if I agree to pick it up later today?
Sorry I can't do it for $22. I'll take $28 with the training wheels assembled on the bike.
And you'll pay the shipping costs?
No you said you would pick it up. This is a local transaction. I could meet you in a parking lot half way between us.