Well if you really just want to through it away you should be able to just toss it in the trash can, or if your gunna give eny of it away ill take eny ethernet/wifi cards. But I dont think you could sell eny of it unless the cd drive is like dvd-rw.
Can you just mail it to me. Otherwise if you dont feel like giving it away. A way to destroy it would be to:1. throw it out the window
2. trash
3. sludgehammer
Or, on a more philantrophic note, you could give it to some local school or daycare or something. There are a TON of schools and other organizations that are looking for computers that people want to donate, it doesn't matter how old the computer is...
I only got rid of my PC which was just about as fast as that about a year ago, dont you datre throw it away, at least have some fun with it and destroy it in a comical fashion, dont just throw it away.