you can always just buy the loose herb too and make a thin tea out of it instead of buying the packages.
Cheaper that way.
You have Sun Harvest grocery stores? Maybe known as Henrys...
Their herbs are a good quality and lower cost then most places.
for a basic tea, boil 2 cups of water and add 2 tablespoons of loose herb.
Steep covered for half hour.. drain the herb and that tea should keep for 3-5 days.
Some require a bit more work .. herbs like.. Valerian for example. But for the most part, simple leafy green things are easy to make a tea out of.