What is Virginia diminished value law?

West Virginia Supreme Court, in Ellis v. King, 400 S.E.2d 235 (1990), found as a

method of determining recoverable damages: "If the vehicle looked and operated substantially the same after the accident but its market value had been diminished by the fact of being in an accident, then to be adequately compensated, the injured party must receive, in addition to the cost of repairs, the diminution in market value stemming from the injury."