Apple Or Pc Which One Do You Own? (computer)

I was just wondering if any of you loyal mac users could help me...I just want to buy a cheap, older powermac or something for the time being. I would like to buy a macbook next year it will be my senior year and I will need a laptop for college). Anyway I found a G4 on craigslist that is reasonably priced and he says that it is a dual 867...making it a mirror door drive, right? Well in the pics he shows it isn't a mirror door drive, could anyone help to I.D. it for me? I asked him for HDD ad RAM specs but he didn't know, so he obviously doesn't really know what he has.
I'd jump on this because it is a good price, and being a 867 it could run leopard.