Cheapest furnace & HVAC air filters per filter

1. 1
   Amazon Basics MERV 5 AC Furnace Air Filter, 16x25x1 inches$4.50 per filter 6 Filters $26.97
2. 2
   Filtrete 16x25x1 Air Filter, MERV 5$5.00 per filter 6 Filters $29.97
3. 3
   Amazon Basics 16x25x1 Air Filter 6-Pack, MERV 11 AC Furnace$5.73 per filter 6 Filters $34.38
4. 4
   Filterbuy 16x25x1 Air Filter MERV 8 Dust &, Made in USA$5.88 per filter 6 Filters $35.27
5. 5
   Simply 16x25x1 Air Filter, Merv 8, 4 Pack$6.74 per filter 4 Filters $26.97

Prices as of Nov 13, 5:30 PM UTC