I sorta know what you mean. There are so many spices, both ground and whole, flours, lentils... aisle and aisle of it.
Luckily, BIR cooking uses a tiny subset of these for everyday dishes. In fact the only things I really need to go to the Indian market for (that they don't have the regular supermarket) are things like kalonji seeds, quality curry powder, and quality chilli powder.
-- Josh