Given a text passage as input comprising of dialogue of negotiations between a seller and a buyer about the sale of an item, your task is to classify the item being sold into exactly one of these categories: 'housing', 'furniture', 'bike', 'phone', 'car', 'electronics'. The output should be the name of the category from the stated options and there should be exactly one category for the given text passage.
Q: Seller: Hi are you interested in my zip bike?
Buyer: Hi. Yes, it's a nice bike but it's kind of old.
Seller: True but I just had it tuned up. My asking price is $400 but it's negotiable.
Buyer: Are there any defects I should know about? I was thinking $200 would be a good price for it.
Seller: No defects, I don't think I can take $200. What if I deliver it to you, can you come up to $300?
Buyer: If you throw in some knee pads and a helmet I could come up with $240.
Seller: Hmm, I do have those and won't have any use for them. $250 with drop off, safety gear and an extra chain I have laying around?
Buyer: Ok. That sounds perfect. $250 will work.
Seller: 
Buyer: 

A: 
bike