Just got a free 15" PowerBook G4 1.5 GHz, 512MB RAM, 80GB hard drive. It only has a combo drive because it's a low end of the 1.67/1.5 model. It does have a decent battery that'll last around 2 hours. It's in like 7/10 conditon, screen is good, everything works just some marks on the casing. I just popped in another stick of RAM and it's got 1.5GB now. So the bottom RAM slot still works but lets see how long it'll last.