I owned an original Bondi Blue iMac for a couple of years, but got rid of it when I left College (no room in my car). My current oldest PPC Mac is my PowerBook G4 500, which is currently used as my dad's laptop. Followed by my PowerBook G4 667 (DVI), which runs my online radio station, but has a dead screen, so I have to VNC into it to do anything. And finally my PowerBook G4 1.33, which is my day-to-day machine.
I also just received a PowerBook 145B from a local thrift store. Technically I was paid 26 cents to take it, and I'm in the process of locating software to make it usable, otherwise it may just end up in storage.
TEG
i used to have two PowerBook 145B