noun
unused item; never-used item
Refers to an item that has never been used, often in the context of second-hand sales or auctions.
これは未使用品ですが、箱が少し傷んでいます。
This is an unused item, but the box is slightly damaged.
オークションで未使用品のカメラを落札した。
I won an unused camera at an auction.
Compound of 未 (mi, 'not yet') + 使用 (shiyō, 'use') + 品 (hin, 'item').