Dealings with Powermax
I bought a G4 from them some years back. I asked them for one shown as a BTO option on the Apple web site, with AppleCare, and they sold it to me. It arrived as promised, and worked properly out of the box. But I eventually discovered it had an idiosyncracy in that it never would wake properly from sleep; it always had to be power-cycled. I tried to get them to fix it, for some time, and they ultimately refused to help me or honor the warranty. Apple would not honor the AppleCare because the machine had originally been sold configured differently than they provided it. (It started life as a generic DP-MDD G4 to which Powermax added a SCSI drive system, a configuration Apple was selling, at the time.) So I was stuck. Ultimately, I simply accepted that it would not sleep, and used it until recently, when it died. Now I can't get it repaired, because it's too old.
Moral: Know what you're buying, from whom, and who will honor any warranty it comes with.