Rune stone of power Errors
There are two entries for Runestone of power on the site: https://www.d20pfsrd.com/magic-items/wondrous-items/r-z/runestone-of-power/ and https://www.d20pfsrd.com/magic-items/wondrous-items/r-z/runestone-of-power-1/. The second link has incorrect info on it. it describes the cost of the runestone from the first printing of the Advanced class guide. It was Errate'ed to remove the 6,150GP cost ontop of the crafting costs.