I think it is well understood that the $6800 price is not guaranteed so it has not really been necessary to discuss it directly.I think that is what most feel is fair, but not reflected in the fine print all of agreed to.
Even your original post does not mention that the price is not guaranteed but assumes that we are aware of this by jumping directly to discussing whether EM will be able to maintain the price and asking how we would feel if the prices goes up.

I am not saying this out of criticism just pointing out something I noticed. Overall I am actually quite enjoying this thread and think you asked some very good questions.