Of course you can buy dried herbs from the superstore. But it is far more economical to dry herbs at home for use in various food items.
You can dry herbs on racks, slats or by placing upside down by their stems. They don’t need sunlight for drying and a well-ventilated, dry and cool environment is good enough. The vital requirement is that the herbs should be exposed to air and turned around after 2-3 days.
You can always place the herbs on an absorbent paper in a microwave and cook on the lowest setting for about 3 minutes for quick drying.