How much is the PS3 you are looking at? I had a few issues with mine but I think it was a corrupted hard-drive. Once I formatted the HD and restored it everything appears to work good. I would suggest you try to play on it for a few minutes and get it good and hot to make sure it doesn't overheat and shut off. Unfortunately theres not an easy way to give it a real workout other than playing it for a while. They make all kinds of external coolers for it which is something I suggest (they get VERY hot). You can find em on Craigslist fairly regularly for under 3 bills....I've even found some for around 2 hundred.