So I want to get a older used Mac to learn the OS X operating system. I am going through ebay and have dug up a couple killer deals on used G3/G4 and G3 Apple iBook. My question to you guys (due to me coming from a Dell sorta world) is what the bare requirments for processor speed at RAM? I would be using this PC mostly for internet, listen to music and msn. For example, the G4 I am currently eyeing is 350 MHz and 256 MB of ram, would this be fine for doing what I want to do? Is there any places that you would suggest that deals with refurb Apples? Please get back to me, the bidding on this unit stops in a day!