A ring of multiple wishes is valued at 20,000 gp, while a ring of elemental command is 25,000 gp?
A rod of alertness is listed at 50,000 gp, while a rod of security is only 30,000 gp and a rod of resurrection 35,000 gp. Seriously?

A sword +4 defender is 15,000 gp, a sword +5 defender is 18,000 gp, but a sword +6 defender jumps to 30,000 gp.
Just seems a little odd how they calculated things.
And has anyone ever handed out a holy avenger +6 or a sword defender +6? The highest level weapon I've ever seen in any of my campaigns in 35+ years has been a +5 holy defender. It's hard to find even a single +6 weapon in the Deities & Demigods books, owned by gods!