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: I'm interested in purchasing the mattress you are selling.  Could you tell me something about it?
Seller: Great, I sure can! It is a Serta Twin XL mattress in excellent condition, with box springs and a frame. It's only 2 years old, so you could get many more years of use out of it! I will also be throwing in a set of sheets and a comforter for free.
Buyer: I'm very interested.  I am a starving college student, however, and the $275 is a bit high for me.  Would you consider $225?
Seller: I totally understand. I am pretty strapped for cash since I am moving. I paid a little over $350 for it, so what if we meet in the middle at $250?
Buyer: I'm pretty sure I can hit my brother up for the other $25.  Let's do it for the $250.
Buyer: 
Seller: 

furniture

Buyer: Why are you selling this?
Seller: Hi! I won an iPhone at a BINGO night so I no longer need this item. Otherwise, I would have kept it for years, I'm sure.
Buyer: Congratulations on the BINGO win! As you no longer need it, I feel that $120 is unreasonable. Because, I will also have to get a data plan which will cost more money. I can meet you at a predetermined location set by you. If I like the phone, I will give you $80 cash.
Seller: I'm sorry I can't go that low. I feel that $120 is a very fair price for a phone in this condition, but I will be willing to part with it for $100 if you can pay cash today.
Buyer: Do you have a cover for the phone?
Seller: Yes, I have a like-new otterbox for this phone that I will be happy to throw in at the $100 price.
Buyer: Come down to $95 and you have yourself a deal. I will stay pay cash of course :)
Seller: 
Buyer: 

phone

Seller: Hey there!
Buyer: Hi there. I'm interested in your phone. How much are you asking for it?
Seller: Asking for around $375. Its 64GB and in great condition, just like when I bought it. 
Buyer: How long have you had it? Does it come with a charger and headphones or anything?\
Seller: I will give you everything that came with the phone. I only used the phone itself, since I already had a charger and headphones. So the charger and headphones have been sitting in the box unused. I've only had it about a year and a half.
Buyer: Okay. That sounds good. 375$ seems a little high for a used phone though. Any chance you could go down to 250$?
Seller: I have an offer higher than that already from someone else. I mean its used but its in good condition and its a 6S so its not too outdated. I'd be willing to do $300 and you come and get it. Deal?
Seller: 
Buyer: 


phone