My humble sugestion:
Unless you are planning to specialize, ie: green tea, puerh, offer a variety of teas and products, so that there is something available for a wider range of customers. Offer flavored blends and more traditional and artisinal teas, organic tea, Fair Trade Certified Teas. And be sure to include, whenever possible, information about origin and harvest dates. I've heard many complaints about that from people who want to be sure they are purchasing fresh tea. I think places like Adagio have a great model, but their teas are from single estates, and they don't include the information.
The same thing for teaware. Some customers want nice gadgets, whle others are looking for a good gaiwan or yixing pot. Unless you are targeting a particular type of tea drinker, I think you will have more success with variety.
I hope that helps.