Love this tea shop! You can pay with foreign credit cards here. I have bought tea from here for…read moremyself and as gifts, and I highly recommend. My favorites are Waldfrucht (forest fruits) and Mandeltraum (roasted nuts flavor). They have 2 tables inside with a bunch of teas that you can sniff with the name and number of what the teas are. You can just ask one of the people at the counter for whichever ones you like and how much of each you want.
I love being able to smell everything and it's fun to go with friends. I've yet to buy a bad tea from them and their teas are nice that they are quite strong tasting. Highly, highly recommend!