Right, you needed a bunch of kids to confirm the value of not only an already rare system, but a dev kit?
Anybody (especially someone who frequents auctions for profit) should know the value would exceed a retail unit ($400 US). This extremely rare 360 dev kit sold for ~$225 US.
Stranger things have happened I guess. I missed out on a 1998 (in '98) Acura NSX that sold for $9,000. A kid got it for his birthday, had a fender bender (literally). The car was fine except the driver's side front fender had to be replaced. They also had the fender, it just had to be painted. The kid was scared of it and "Daddy Warbucks" wanted it out of the driveway because it was an "eyesore". I raced over there to get it, but someone beat me to it. I got there in time to watch them drive away in it.
^I don't know why I told the story.