Sorry, I just had to get message 4200, this is a flimsey excuse for doing so.
Much as it galls me to say, I think maybe Sturm has a point. Form some kind of organisation to control the prices of runes. They are powerful enough that people will always need them, so why cut the prices and spoil your own profits?
Maybe RPEG (Rune Producing and Exporting Guilds) needs a third party to coordinate? I suggest a god.
Mephisto, god of commerce and economics