Ok just being on the west coast doesn’t narrow this topic down at all.
Are you looking for prepared tea, loose leaf, or bubble tea? Depending on which city you are close to there are tons of great local options.
For loose leaf tea in bulk, I usually go to an Asian grocery store. They tend to have pretty affordable loose leaf options that a tasty.
When looking for something specific, I try and find a local tea shop to browse the loose leaf variety.
If you’re in a pinch and need some bagged tea, most grocery stores carry Celestial Seasonings. Their herbal teas rock, my favorite is the peppermint!