I live in Wisconsin and my 24 year old car is finally ready to be gotten rid of. The exhaust system has fallen out of the bottom. The body is rusted badly, and there's no telling if it would last much longer if I were to get the exhaust system fixed.

Since the engine still runs (only has 94,000 miles on it), I was thinking of putting it on a classified ad site to anyone who might want it (for free), but since it's registered to me, I'm not sure of the process. I guess someone couldn't just come and get it and take it away. What else would need to be done?

Also, if I wanted to take it to a junkyard and sell it for scrap, what kinds of things would need to be done with the registration, etc.?