I have a PB G4 that is dead. I think the HD is shot because the computer won't start up at all (I get the flashing question mark icon). I could not reboot the computer even after I found the disk. It appeared to me that the HD was recognized but it had an 'exclamation' mark over it in the icon. I dropped it off at my local independant Mac store so that they could have a look at it. If the HD is indeed screwed up, how much should I expect them to give me if I decide to sell it? I just don't want to be taken advantage of because I don't really know the value of used computers. Could anyone give me an idea? Thanks.