The deity-specific holy symbols in the Complete Champion book are really terrific little bargains for many spellcaster types. Especially since they all come at a very reasonable cost of 350gp. And to note, these holy symbols represent Greyhawk gods - and only a small percentage of them to boot. Which leads me to think this small sampling it meant to show that similar holy symbols could be created for the other Greyhawk gods ... or for Forgotten Realms, Eberron and homebrew pantheonic gods.
Has anyone reverse-engineered the costing foundation of these cost-effective pieces of magical gear?
Also, have any of you created similar customized 350gp holy symbols for deities in your campaign world? I'm especially interested in holy symbols for the various Forgotten Realms gods.