im looking for a new..well used mac off ebay. i was looking at the ibook and powerbook. i found a 1.42ghz ibook when i had it sorted by price and then 2 listings under it was a power book 400Mhz?! since when is a g4 powerbook lower then the ibook? i was just wondering if theres some tip i need to know here or is the g4 powerbook really slower then the ibook? because as far as iv seen the g4 ibook is 1.07ghz 1.2Ghz 1.33ghz and 1.42ghz but then the g4 powerbook starts at 400mhz and goes up from there, highest one i seen so far was 1.67ghz so my main question is why is the g4 powerbook slower then the g4 ibook? thanks