Who would have believed it. Apparently they're honoring the Guardian of Order pre-orders so good on them. It's also available in PDF form, but that's like $27 so since the physical copy was actually out I just bought the thing. Supposedly it'll be in stores soon.
Ironically, I'm not sure I'll ever actually play a BESM 3 game. But what the hell, I've thrown enough time into this system, I want to see what they did with it.