Ok, first the member ess is pure ess, correct?

Secound I'm paying a firm price of 80 gold per ess. I'm only buying in packs of 500 +

What em I duing with this ess? I'm running crazy amounts of nature runes [4000] and selling them for a firm price of 1.2m and re do the process until i have a whip full rune and a fury amulet. :p