Well, at least it's obvious that they planned to rip the customers off with the accessories.
"At $599 for the optical viewfinder, $179 for the lens hood and $249 for the thumb grip the mark-up on these items appears to be rather excessive but it remains to be seen whether future RX1 users will prefer the original parts, or steer toward the cheaper far-eastern knock-offs that will no doubt appear on certain online marketplaces. The electronic viewfinder will cost $449.99 - $100 more than the equivalent unit for the NEX series of cameras."
So if you add 1 viewfinder, the lens hood (which is mandatory) and the thumb grip, you're up by at least 880 $ at retail. That's a bit ridiculous in my opinion, I only know that kind of pricing from Leica.
You could ditch the thumb grip but I couldn't imagine getting a camera in that price class and not getting a viewfinder for it, the same for the lens hood (which should have been included in a base price of 2800 $).