Wouldn't a Guidance Of The Avatar ongoing item fall under the "Gauntlets Of True Striking" exemption to the guidelines, where if the spell would do the same thing as an existing bonus guideline you price by the bonus instead of the spell?
hmm ... can't be too sure.
The problem with a True Strike item, has always been the rule: CL = Bonus * 3 ; with that attack bonus.
CL of 60 is out of reach for the casual player. Although 1*60*2000 and heavy C.O. = affordable at high levels.
I had a thread on this back at old T.O. ... probably lost.
Skill Bonus Items don't follow that rule.
Custom Items either follow the guidelines, or the DM can Fiat something else.
Technically an x*y*2000 always on item, is custom.
Wand of Guidance Of The Avatar is not custom.