I've done that as well, chunked every single thing he owned out in the yard for leaving something valuable of mine out in the yard to get rained on. Once he got angry about something and chunked my cell phone. I was there to witness it. I didn't say a word, didn't go pick up the phone, didn't check to see if it was broken. What I did do is march into his room, got his CD player down from the shelf, took it out in full view of him and smashed it to bits with a ball peen hammer.
By then he had retreived the phone and discovered it was fine and he complained to me about that. I told him I was operating under the assumption that it was damaged and would likely do the same thing the next time. So far we haven't had to test it.
I told him he could earn the money for another CD player by doing a list of chores. He has since replaced it, and now has an idea what it feels like to have to pay for something on his own. I'd rather not talk about the CD OF MINE that was in his player when I smashed it! Lol!
I have probably given ya'll a pretty bad impression of him. He's really not a bad kid, smart as a whip, but he has some bad moments.