Instructions: 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.
Input: Buyer: Hi I'm interested in your bike.
Seller: Hello. It's a great bike. It's a collectible. I'm wanting $180 for it.
Buyer: Ok, but I'm worried about the rust, do you know if it's gone through the frame?
Seller: No, it's purely cosmetic. A fresh coat of paint will fix that right up for you.
Buyer: Well it's a little more work than I care to take on. I'd like to get it for $90. I'm probably going to have to take it to a restorer.
Seller: It really won't need much work at all but I do have some wiggle room. $90 is just too low for the collector's item. I could take $160 for it.
Buyer: I'll bring my offer up to $110 but do you have a helmet I could have. Safety first and all that.
Seller: Ok. I'll take $110 for and throw in the helmet.
Seller:
Buyer:

Output:
bike