If you want to bring the prices down increase fire weather to a reasonable amount and don't make geodes craftable anymore; sure fire weather is the rarest of the bunch but Ifrites don't cost nearly as much because you can't craft them... this is probably going to upset crafters (and farmers) of course; but to be honest this was a bad decision to begin with being able to craft a magian trial requirement from a rare drop geode into a desirable and more importantly profitable item.