Taint is the ingredient in high demand. The higher it sells, the better it is on my end, but overall its the
UO economy who will end up paying more for items due to inflation.
Scrolls can only be used once, and a character is set for life and is in no longer in demand for them. As more and more scrolls are introduced on the market, their value lowers. This hasn't been the case with ingredients like taint (mullicent is in another bargin basement category in itself). Ingredients which can be used to make things, and with every expansion the options to make things become more and more.
There is much less risk involved and more to gain by doing a peerless(Trammel Facet). You dont have to defend a peerless from a raid, and you have the added bonus of being rewarded with peerless loot such as Crimson Cincture and Crystalline ring. Both items retail for 30 million in gold. This benefit has made many millionaires in the course of an evening.