Save your money. If you are comfortable, opening a PS3 should not be a big deal. It must be out of warranty anyway. Watch some YouTube videos on how to open your PS3 model and clean it. If it still makes noise, then maybe you can take it to a repair shop. I haven't opened my PS3 console yet but I have opened the controller numerous times without any issues.
How about accepting multiple copies of a game from different donors? This already maybe the case but I can see only single copies listed or it appears so. May be adding a number next to the title will help? Just a suggestion.