Hi, you have a nice bike there. I was wondering if there was much wear visible and tear on it.
No, its in great shape! My daughter rarely rode the bike . . . tires still look like they have full tread on them and there are no scuffs or scrapes on the bike. I also think I have some streamers and a Hello Kitty helmet I can throw in if you're able to pick-up tomorrow.
Do you still have the receipt and know if there is still a warranty for it?
Yes! The bike was purchased last summer for $120. It has a one-year manufacturer warranty on it . . . so you have about two months left on the warranty. 
That sounds good, would you take $27 dollars for it?
No, I'm sorry . . . that's too low. It's less than a year old and in near perfect condition. I have it listed for $45, but my bottom dollar is $40 (plus I'll provide the warranty/receipt, helmet, and streamers at no additional charge). Would you like to pick it up tomorrow?
Well I could pick it up tomorrow and go as high as $35. Would that work for you?
Deal. I'll send you my address and we can get you this bike tomorrow! Thank you!