https://www.woot.com/offers/winix-c...4?utm_medium=affiliate&utm_campaign=CJ&cjeven Winix C545 4-Stage True HEPA Air Purifier w/ WiFi & PlasmaWave Technology (Refurbished) on sale for $59.99. Shipping is free for Amazon Prime Members (must login with your Amazon account and select a shipping address in order for Woot to apply free shipping) or is $6 per order.