I'm really excited about getting this system, even if it is an older one. I'm getting a PowerMac G4 500mhz, with 512MB of RAM for $100 + some shipping. How? Well it has a dead hard drive I guess. But otherwise works fine. The previous owner and I are working on shipping but I'm so excited! Anything I should know about PowerMac ownership? I already have a Powerbook (my P-P-P-POWERBOOK!) G4 that I love to death, is this going to be much different aside from it not nearly catching fire when I try to render something in terragen? I plan on adding in some more ram and maybe upgrading the G4 itself. How much does a Sonnet or Powerlogic upgrade cost nowadays?