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.

Seller: Hey there are you interested in my Polk Audio 5.1 Home Theater System w/ Onkyo Receiver, cherry? its in great condition.
Buyer: What is the lowest you can go?
Seller: I can part ways with it for about $350 if you can come and pick it up from my place and everything. Does that sound like a fair deal? the original asking price is $100 higher than that.
Buyer: I can pick it up but the best I can do is $300
Seller: I really can't go any lower than $350. Its got all of its original items included, and is in excellent condition without a scratch, in the original boxes, with all the original manuals.
Seller:
Buyer:
electronics