Walmart and Amazon currently have a filter replacement pack for Coway AP1512HH Mighty and Airmega 200M air purifiers for $36.19
1 Year Replacement Pack: Includes 1 HEPA filter (replace once a year) and 2 carbon filters for odor control (replace 6 months)
Shipping is free at both retailers.
https://www.amazon.com/Coway-3304…B00C7WMQ