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 there i am interested in the mattress .
Seller: Hi yes it's still available
Buyer: Great a couple questions for you.. is this a smoke free home?
Seller: yes it's a smoke free home and it's in a great shape
Buyer: is it new or used?
Seller: it's slightly used just got it a month ago but I'm moving so I need to get rid of it as soon as possible
Buyer: fair enough, does it have any stains?
Seller: no it's in great shape I am asking $100 for it but like I said I'm moving soon so I'm willing to negotiate on the price
Buyer: I don't want to low ball you.. how about $90?
Seller: that works for me
Buyer: great!
Buyer:
Seller:
furniture