Couple of thoughts:
1st: nobody knows, not even the people making these units pictured, know what the final pricing will be. What you see here are working prototypes. 'Mules' in a sense.
2nd: Pandora's box has been opened on billet hinges. I would be willing to venture a bet that there will be more than one source for for these. It's obvious that people really like them and it won't take long for the market to react. These days it's all about fresh ideas and getting them to market first as whenever there's something cool that comes out, there will definitely be competitors wanting in on the action. How many companies make tubular UCA's for 1st Gen F-bodys now?
Of course, this is just my opinion.