So what are the odds of this taking off and becoming mass-produced? If so, what price could it be sold at? I'm wondering if it would come down to the base level for a Brompton ($1500-1600, right?).

Congratulations to the Helix team and its supporters. I stopped reading the thread because it was a repetition of naysayers and supporters on the same old arguments. I confess I wasn't exactly expecting it to work, but definitely hoped it would. Can't imagine any fans of folders not wanting a great new entry into the folding bike industry.