Most, if not all, of the losing bidders probably were not "people who wanted more coins" but "people who saw a chance to make easy money if they were lucky and got some coins well below market" (like that guy who bid at 403$).
Anyone who has that sort of money and believes that the price will go significantly higher than market should be buying on the exchanges, auction or no auction, until the market price got higher. The fact that the price is now more or less stable ~650$, for example, means that everyone who still has money in hand expects to lose money if he bought for more than that.
So I don't think that any of the bidders, not even Draper, bid above 600$ (the max market price on Jun/27); and in fact I believe that they all bid at 550$ or lower. An investor who got the coins at 550$ would be expecting to make 150'000$ profit, from gambling
By the same reasoning, if the auction was today, I believe that there would be no bid higher than 600$.
It's already been calculated that Second Market's losing bid was $665.
That's not true.