I have two like-new Coway Air Purifiers for sale. The model number is AP-1512HH. These machines are phenomenal, they are widely lauded by many websites, including New York Times: https://www.nytimes.com/wirecutter/reviews/coway-ap-1512hh-mighty-air-purifier-review/ These are normally $230 new. The listed price for one single air purifier (two are shown in the photo).