Totally agree. CarFax or no CarFax, if someone was negligent and causes an accident, I'd throw the book at them with properer representation for a maximum Diminished Value claim. The at fault party's insurance company will try to finagle out of it but only if you let them. They are legally required to not just fix your car but make you whole with a comparable rental plus diminished value if your car needs to have body panels repainted and is now thus worth less. Look up "Petty Details Diminished Value." If nothing else, hopefully they will learn a lesson about not being negligent in the future and causing harm to others.