I also agree with the No. Not a great system, and largely overpriced. A 17" G4 Powerbook would be nicer if you have the money. Otherwise find a better deal =)
Thats a good price for a used iBook but then you have to be weary of the dreaded logic board problems which are present in that series of iBooks... Then again $600 is good if your just gonna use it for word processing, web/email you just need more RAM but 192 should suffice