We can certainly sell you filters, but they are typically available for similar prices from local hardware stores or online.
The important note with filters is that we recommend purchasing the least expensive ones possible. The high end options that are marketed for removing all sorts of things from the air in your home are just too restrictive for your heating and cooling system. For proper efficiency and system reliability, air flow is critical to your heating and cooling system.
It is also a good idea to check your filter regularly for this same reason. Blocked filters cause a large percentage of emergency service calls, and this can easily be avoided.
One recommended model >