Variety would be one of the selling points, I'd think. Look up die cast 65-69 Mustangs and you'll find every variation you can think of.
In fact, if someone made an original-looking model that you could then buy accessories for and swap out panels, fenders, tires and suspensions, that would be a great way to let guys like us build our dream Broncos in scale before we spent thousands doing the real thing. Plus, having a small version of what you're busting your knuckles for on your desk at work would be great motivation to get back in the garage for a couple hours every night.