Yugster offers the Vaas Mini Air Purifier for $9.97. Coupon code "FreeYugBuck" cuts it to $8.97. With $3 for shipping, that's $41 off list and the lowest total price we could find. This direct plug-in ozone air purifier features silent operation and a low level night light.
Note: The countdown timer on the product page does not reflect an actual expiration time and resets daily.