Skip Doctor, Game Doctor...they both work well. The manual version is around 30 bucks...it will fix around 30 CDs before it needs to be replaced (the rotating buffer, not the machine iteself). You have to follow the instructions EXACTLY, as you don\'t want to cause MORE damage to the disc. But it\'s worked wonders for me.
The electronic version will run you around 50-60 bucks...which is the one I have.