Best Buy via eBay offers the GermGuardian Digital 3-in-1 Air Cleaning System, model no. AC4825, for $69.99 with free shipping. (Amazon charges the same.) That's the lowest total price we could find by $30. This 22" tower air purifier purports to capture allergens, use UV-C light to kill common germs and bacteria, kill airborne mold spores, and fight unwanted odors.