i believe Mikhail didn't always really know what the fuck he was doing, and those custom builds, more often then he liked, required endless rebuilds to get it close as he could to right. plus, there is this false perception that a higher price point equates to something necessarily having to be better, which isn't always the case, but from a marketing perspective it is very effective especially to those with money to burn. i did have issue(s) from the get-go with Mikhail's pricing scheme and many other things long before he went down for the count, but I didn't mention any of that stuff here.
based on your conservative estimate, i would have issues with a 70% mark-up. that isn't to say it isn't worth it, though, it would have to be heads and tails above the competition to justify it's price and for me to perceive value in it. unfortunately, i believe they'll sell less pinnacles than 307a. i guess, if it were me, i'd rather price it a bit lower and hope to sell more than just a few.