I think this may be something worth making a sticky for those looking to buy CPO. I am running through the hoops with a dealer currently, one who was using the vague guidelines on the main Scion/Toyota site to try and get me to back down.
However here are the actual guidelines/definitions for some of these things set by Toyota/Scion and should be looked at carefully and gone over for anyone looking to buy CPO
http://hub.toyota.com/hub/portals/0/...%20Process.pdf
Don't let a dealer tell you what they find reasonable based on the main website guidelines. Here is what Toyota expects dealers to follow.