Is Sarpagandha cultivation legal and does it have a buyer?

This is an important question. Sarpagandha, the source of reserpine used in blood pressure medicine, is a regulated plant. Wild collection is restricted because it became endangered, so you must rely on cultivated material and follow the legal rules. Before you grow it, check the current regulations with your state forest or medicinal plant board and the National Medicinal Plants Board, since there can be requirements around source of planting material, cultivation registration and transit or sale permits for certain medicinal species. There is genuine pharma demand for the roots, but it is a specialised buyer base, not an open mandi, so confirm an actual licensed buyer and a written price before planting. Do not collect from the wild. Verify both the legal position and a real buyer for your state before committing, because this crop has more compliance steps than most.