dual 1.8ghz G5 box for $100 is pretty darn good if you ask me. worthwile just for the case. at any rate, i owned one for 2 years and loved it. it was great for ppc gaming (x800xt) in it. and fine for doing day to day nerd stuff.
I now only have a 2.3 dual G5 as my only PPC box in the house and find it i the same relative terms of speed, but its a hell ova lot noiser with wind tunnel sound.
I really enjoyed my 1.8 DP PM, but if your looking to sell it on and not use it, dont bother.
cheers