My PS3 60GB reads and plays all of my games fine and most of my blu-rays. But, for some reason it wont play Superbad on Blu-ray or Letters of Iwa Jima on Bluray. Thats it. I have another blu-ray player and the disks work fine. Is somthing wrong with my ps3?? because it has the latest update. And how much is a slighty used PS3 60GB worth??