My card collection is about the only thing that I like to have just for the sake of possessing it. That and some sentimental family objects. Otherwise, I don't care about things as much as I care about experiences.
When I look back on my life so far, I almost never remember what couch I had or how nice the stereo sounded. All I ever remember is what I was doing and who I was with.
So ... although the car is technically a possession, it really is more about the experience you would have driving that car around the area or US. Cards are also mixed with experience too, in that there are certain travels in the collecting process. Maybe that's why I really am tuned into owning them, unlike other possessions.
But all I ever really remember is what I was doing and who I was with. Go for the car.
J