Runescape merchanting tips?

With the addition of bots into the system, prices are plummeting. I would recommend laying off the merchanting until the bots thin out, which will be soon. Arbiter(a developer for RSBuddy, one of the leading bots) Is implementing his ArbiBots system soon, which will make many of the scripts that leechers abuse for free, paid. This will greatly reduce the amount of bots, and help in healing the economy. Until the bots thin out and RSBuddy 1.20 comes out with the Arbibot system implemented, why not just go PKing?