Cheapest herbs and poisons in the whole of avalon are now for sale in the Thakrian stalls.

Darsurion at 9gp, Olvar and Lestagii at 15gp

Also all your favourite poisons... nann, mandrake, phoroz, kaskamak, jegga

Poisons are NE and SE thakria sq, herbs NW thakria sq