The answer to 'how much does air filter cost in my area' is that the cost of an air filter can vary significantly depending on your location, the size and type of filter needed for your HVAC system, and the brand or quality. In general, you can expect to pay anywhere from $10 to $50 for a basic air filter replacement, with higher-end filters costing more.
The price is influenced by factors like the filter material, MERV rating, and whether it's a standard size or custom fit. It's best to consult with a local HVAC technician or check with local home improvement stores to get a more accurate estimate for your specific needs and location.