Completely anecdotal but having watched sgi hardware on ebay since forever, I'd say that something like 99 out of 100, or maybe even 999 out of 1000 items, are ludicrously overpriced. Occasional gems pop up but they're rare and if you blink you miss 'em. I got my Octane2, complete with every imagineable piece of hollywood special effects software installed and running, for a mere 180 USD...