certicards

What added value does the original certicard give to vehicle? Is it that important, or is it just one of those things that trailer queens aren't complete without? I'm looking at a three previous owner '66 Barracuda that has it attached to the right fender well about four inches in front of the shock. Although I know there are three previous owners, only two have legally owned the car so would that make me the true tird? lol