Cripes, that's an eye-watering price. You might want to check out hibiscus tea (made from 100% hibiscus, not tea-plus-a-bit-of-hibiscus). If you buy hibuiscus from somewhere like a middle-eastern or Mexican food store in the US rather than a health store, expect to pay around $15/kilo. Around $4/kilo in Mexico and Egypt. A kilo is good for about 250 cuppas. Two or 3 cups a day appear to take around 7mm Hg off the top.