I paid $369 for a wifi/LTE early bird special on the Indiegogo campaign site. It's still available for $400 plus shipping; I don't know where you're seeing $600

I paid $369 for a wifi/LTE early bird special on the Indiegogo campaign site. It's still available for $400 plus shipping; I don't know where you're seeing $600, but that sounds like a scalper price from a retailer claiming early availability.