韜奮日記:Ozone Generator $15.
saw it at Slickdeals, only works in Amazon biz accounts.
Amazon.com: ROMECH Ozone Generator, High Capacity Ionizer Air Purifier Ozone Odor Eliminator for 4000sq.ft. Home, Basement, Kitchen : Home & Kitchen $15
$15
coupon code: 50CN1RLX