Rarity of Rusted Cars? Or the grind?

[kriller509 13]

Hi, I bought up to the beta and I was curious, what makes having a rusted car cost so much extra? By that I mean, how long does it take in-game for someone to acquire a rusted car? Because if I'm paying extra for a car that would only take me around 2 hours in-game to get, I'd wanna know.