How to get enough money for a PlayStation 3?

I am 13 years old, I will work so hard to get this i will do work around the house whatever it takes but then again i only get like around 10-20 dollars a week for my chores. I plan on selling my sims 2 games for the computer ( I have like almost every one.) But i dont know how to use ebay. If anybody knows of a tutorial or tips for selling it would be great. But I just really want a PLAYSTATION 3 so i can play ratchet and clank on it and not share with my annoying brothers. So i would need around 430 dollars.