Ending today, Groupon offers the Honeywell HEPA Allergen-Removing Air Purifier in White for $49.99. Coupon code "JUMBO3" cuts it to $44.99. With free shipping, that's the lowest total price we could find by $65. It features a true HEPA air purifier, four cleaning levels, electronic filter replacement reminders, 2-, 4-, and 8-hour timers, and 155-square foot room capacity.