I found that same gold car in the above pic today at Wally-world. They do look super cool, but I doubt if they are rare or worth more. None the less, it is a cool casting with a metal base. For mattel in this era, that's pretty good.
That specific casting was brought out one or two years ago in all black with silver streaks and then later in a metallic pink/purple. I think mattel calls it a limo which is only the 2nd or 3rd that they have ever casted to my knowledge.