I am looking to sell my Blueair Hepa air purifiers. I have a 303 and a 203 model. Both filters use the same size Smokestop filters. Both are in great condition and function perfectly. The purifier includes: - original box - a filter lifespan timer - window seal tape 303 model for 2300rmb (original price 4260rmb) 203 model for 1800rmb (original price 3590rmb)