The two types of tea featured are Saemitori and Yabukita and each is priced 840 to 2,100 yen based on grade. The Saemitori is said to have a strong umami taste and low astringency. The Yabukita is said to have a strong aroma and a nice balance of umami and astringent tastes. The only difference mentioned for the high grades is that they are hand picked.
These are typical grades, but if you ask the shopkeeper, much more expensive grades are also available.