I've heard conflicting reports as to whether the Halcyon was ever released to the public. I know they made a handful to show to the company's investors. Supposedly they had a few on sale in L.A. or San Francisco or something, but I've never been able to confirm this. Even calling the 2 discs that were available for it "video games" might be a stretch, they're more going through the menu on a DVD. Choose option 1 or 2, watch some video, choose option 1 or 2, watch some more video, repeat... Not really interactive.
Either way, it's gotta be the hardest complete system to find nowadays, I think there's only 2 or 3 out there.