My current warlock twink has herbalism, I just hit 155, and I have turned quite the profit, Briarthorn selling for around 25-30g a stack and swifthistle going for about 22g a stack. Not to mention the beginner plant (Peacebloom, Silverleaf, and Earthroot) all sold for 5-10g a stack. Coilfang economy can be on your side sometimes >:3.