I have a 14" iBook G4
1.2ghz G4 w 133mhz fsb
+1.25gb DDR (PC2700)
+32mb ATI Mobility RADEON
+CD-RW/DVD-ROM Combo Drive
+2 USB 2.0/1.0
+1 FireWire 400
+AirPort Extreme
+56k v.92 Modem
+10/100 T BASE Ethernet
+60gb 4200RPM HD
(roughly) $2,400.00 US
Not that bad when you think about what all you get with it.
OS X 10.3 Panther
iLife '04 (includes iTunes, iMovie, iDVD, GarageBand)
And all the other little apps and utilites.
The iBook G4, when equipped like that, can give even a G5 a run for it's money (not much money, but you understand what I mean
)
It's a very dependable machine, it has great looks, and it usually makes others jealous (from my experience anyways
)
And yes, you should go to an apple store and preview one before buying. But you shouldn't worry. Once you buy it, it comes with all the books and manuals you need to get the most out of it.
EDIT: Yes, you can build a cheap PC, but you can't use it on an airplane, or on your back porch, and you can't exactly take it to a nearby hotspot either