Picked up a cosmetically immaculate 400MHz Titanium PowerBook G4 last week, wasn't powering on and needed CD drive replacement.

Had a spare 500MHz one at home, working but with a smashed screen - made one out of the two.

New specs are 500MHz, 768MB RAM, 20 GB HD, DVD-ROM, Airport - not bad for a slight detour on the way home from work and a couple of hours swapping bits!!!

Battery seems to last 15 minutes though... Not unexpected...