I think his raising prices is perfectly acceptable, and I'm flummoxed over all the negative comments. Clayton's response could have been gentler (to help ease bruised egos), but he is not in the wrong. He must have been losing money on each pair, so he corrected it asap.
I want my audio dealers/manufacturers to stay in business. If that means I must shell out a few hundred more, I'll do it so long as that is the gear I want. Of course, I love getting discounts whenever possible.