I am am talks with three different dealers right now to try and trade my car in and dealing with the whole diminished value from being in a minor wreck. If I can't come to an agreement very soon then will break down and try to do a private party sell. Mine was nothing like yours though, I just had to have my rear bumper cover replaced but a Carfax ding is a ding none the less. In hindsight I should have gotten a letter of diminished value(if that is the proper term) after my car was repaired and gone to the insurance company of the person that caused the damage and tried to collect the money that my car devalued by due to that Carfax ding. Not sure how that all works out when approaching your own insurance company.
--Admiral Aaron Rouse