G4 at 1ghz CPU is not a great choice now.
You want an Intel Core Duo chip at a minimum in any machine.
That’s it.
G4 at 1.33ghz is a great choice with maxed ram now running Tiger. Two revisions newer than the G4 iBook 1 ghz which only had USB 1.0.
Forgot to mention that the last revision G4 iBook 12” 1.33ghz (this is a twelve inch screen) has USB 2.0 on it. Also has scrolling trackpad, sudden motion sensor, firewire 400 etc.
Good little machine. I’m fixing one up for my best friend now. It comes with Tiger. Craigslist is fine if you do it safe.