Thumb Score: +23 Woot! has Winix C545 4-Stage True HEPA WiFi Air Purifier w/ PlasmaWave Technology (Factory Reconditioned) on sale for $63.99. 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 otherwise $6 per order. Thanks to Deal Hunter Navy-Wife for sharing this deal.