I got a refurb 1.67GHz G4 PB. Took it out of the brown box, plugged it in, sat down, hit the power button, and got ready for my discount Mac experience. (FYI, I loooove starting a new Mac!)
What do I get? The question mark folder that means there's no useable OS available to the CPU. 😕
Big deal? No -- I just installed Tiger from the disks and got on with it.
But you should keep in mind that the thing's not new.