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.

Buyer: Hi I am really interested in your bike. My son has been looking for one and this looks like a great bike! Can you tell me something about it?
Seller: This bike is great, and I had some good adventures with it. It's a great downhill bike and I think your son would love it!
Buyer: how are the tires and is it rust free
Seller: There is no rust on it and the tires are brand new.
Buyer: Well , I was thinking I could pay about 575
Seller: Since this bike is in such a good condition I cannot take any less than $700.
Buyer: Well could you deliver it if I pay the 700?
Seller: I could deliver it to you today if you paid that.
Buyer: ok i will do the 700
Seller:
Buyer:
bike