You are missing important aspects of the machine. You don’t indicate what model and what cpu.
You can also get a G4 Apple Powerbook but really you should get a machine with the intel Core solo chip.
You can get an Apple Mac Mini for cheap if you already have a keyboard, mouse and monitor. Those are available for around $500.
Apple is rumored to have a new one in the pipeline too.
I mean at least an Intel chip, but prefer an Intel Core Duo, not the solo.
(I have a mac mini to run my stereo with the intel core solo.)
Would shy away from the G4 chips. You want a better CPU and the Intels are the way to go now with Apple.