Amazon has the 6-Pack Frigidaire PureAir 16x20x1 MERV 8 Allergen Pleated AC Furnace Air Filters for $50 - 30% off (check “Save an extra” box, eligible on first S&S order for this product) - 5% off with Subscribe & Save (can cancel at any time) = $32 with free shipping on $35+ or with Prime.