Ultraviolet Furnace Air Purifier - $25 (Parkville)

UV100A SINGLE BULB 120V ULTRAVIOLET SYSTEM, COIL IRRADIATION Improve Air Quality and Energy Efficiency The Honeywell UV treatment system helps create a more energy-efficient smart home and improve air quality by reducing the amount of mold spores and airborne bacteria distributed by your HVAC system.
Unit sells for $130 new.
This item come from a clean, pet and smoke free home.