Generally speaking, older vehicles are much easier to steal than newer vehicles. I have a friend with an 1980s Toyota truck who clubs it wherever he goes, not because it's a nice truck, not because he can't afford to lose it, but rather because it will definitely get stolen if he doesn't club it. Without a club, his truck can be stolen in under a minute by any layman using a little more than a flathead. Before he got the club, it was stolen multiple times -- usually turning up a week later, abandoned somewhere, and/or used as a shelter by a homeless person.