Amazon offers the germguardian Digital 3-in-1 Air Cleaning System, model no. AC4825, for $79.99 with free shipping. That's a buck under our January mention and the lowest total price we could find by $11. 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.