dcollins
Explorer
Rkhet said:There's the DM's Discretion thing again. You have to look at similiar items.
SRD:
Epic Spellcaster: This magnificent adamantine rod grants its wielder a +10 insight bonus on Spellcraft checks made to cast epic spells for as long as he or she holds or carries the rod.
Caster Level: 21st; Prerequisites: Craft Rod, Craft Epic Rod; Market Price: 245,400 gp.
This is an excellent example that I agree with. There are certain hypothetical "new items" that everyone wants to get clever with because they're going to break the game -- continual cure wounds item, continual shield item, protection from evil item, spellcraft skill boost, use magic item skill boost, craft skill boost.
Spellcraft is really a unique skill, and completely key to how the Epic spells system is laid out. It's totally broken if anyone can grab a huge Spellcraft skill boost off the shelf. The price of 245,000 gp is what the Epic designers decided was balanced in the context of that ruleset.