Did you know that they have used tea bricks as currency in Tibet? From Wikipedia:
Tea bricks for Tibet were mainly produced in the area of Ya’an (formerly Yachou-fu) in Sichuan province. The bricks were produced in five different qualities and valued accordingly. The kind of brick which was most commonly used as currency in the late 19th and early 20th century was that of the third quality which the Tibetans called “brgyad pa” (“eighth”), because at one time it was worth eight Tibetan tangkas (standard silver coin of Tibet which weighs about 5.4 grams) in Lhasa. Bricks of this standard were also exported by Tibet to Bhutan and Ladakh. [http://en.wikipedia.org/wiki/Tea_brick#Use_as_currency]
Talking about money, how much is the most you have paid for a cup of tea? It would be interesting to hear your stories about tea purchases. Do you know which tea is the most exclusive variety on the market at the moment?