Refurbished Shark Air Purifier $65

This refurbished Shark HEPA MAX Air Purifier falls to $64.99 at Woot. Shipping is free with an Amazon Prime account. Otherwise, it adds $6. New models cost more than double. Refurbished models start at $70 elsewhere. It cleans up to 1,200 sq ft of air per hour, and the filter lasts 6-12 months.