After looking up the Imperial Tea website info, I looked at the Peet's website to see if they had any interesting new teas. (They sold an exceptional black pearls several years ago that I keep hoping they'll offer again).
Anyway, they have quite a selection of new rare teas, generally produced in small lots. Most are $15-20 for 2-4 oz.
The best way to enjoy these is to go to one of the flagship stores--Laurel Village in San Francisco, the original Walnut store in Berkeley, and I think Menlo Park on the peninsula. Most Peet's stores serve some rare teas, but the staff may be less careful with the water temperature.
A generous cup at Peet's is $1.35 (served with a teapot, strainer, and timer, and they will give you a second round of boiling water if you hang around); the rare teas are a bargain at only $2.
-Winter Pear, a fragrant oolong although I still like their Golden Dragon Oolong. I preferred this after it had cooled down. I also took the leaves out of the pot and put them in the extra cup so I could rebrew at home.
-Imperial Red, from Fujian province. I wasn't that impressed with this tea. It was a bit light for a black tea, but maybe I wasn't in a delicate mood.
-Ancient Tree teas. (See the link) Didn't get to try these, and at $20 for 1 oz, I want to taste before I buy.
-Assam Mangalam. Peet's Assams are malty and hearty. This is not a new offering.
More on their website below.