I'm guessing a combo of the first two posts. When the last Pro and Deluxe for the 1366 launched they hovered around $250 and $300 for the first week or two I think and then dropped to around $200 and $250. I think the Deluxe is still up there too. They tend to hold their price pretty firm.
Assume maybe a $50 mark up and you're left with $150 and $200 respectively for launch. They still have the SaberTooth and Maximus to put up in their higher slots so that would seem to make sense as well.