Well, I know that some potions sell good per each potion. On my server, Lesser Invis potions go for like 80s-1g each. Also, selling herbs wholesale can net you some cash for those people that would rather buy herbs that find them
Also, you could transmute Thorium into Arcanite bars. althought there is a cooldown, if you sold what you transmuted you could make some nice cash.
That's all I can think of.