As others have said: CarFax is only as good as the reporting agencies that supply information back to it.
I bought my current 2000 Class A a couple of years ago at a wholesale auction. It was a Bank of America repo and you don't get any history or know anything about them other than what you see at the auction.
The CarFax showed only the DMV Registrations and Inspection records, however it did tell me where the motorhome had been mostly located since new. It was several towns in west Texas and eastern New Mexico. That info was one of the deciding factors in my interest in the unit since I knew it was not from a coastal area or far northern area which could have been prone to flooding or salty roads.
Just my 2 cents worth.....
Michael
Michael
2000 Holiday Rambler Endeavor Gasser
2013 Honda CR-V Toad