Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Humidifier was Used

My son liked the cute Dragon Humidifier. We were disgusted when we opened the package to find that the humidifier had been USED. I am annoyed that Amazon sent me someone's return and did not bother to check it before sending it to me. (Amazon does sell Used items, why did I have to pay full price for this mess?) There were scratches in the water basin and a greasy fingerprint. Very unsanitary. Amazon needs to clean up it act!