There's no reason to believe prices are going to rise with the advent of new content, more and better items, and an increased ability for players to further trivialize older content.
I can't imagine the up-tick in Iksar SKs is going to be so severe that items like the Nocti are going to evaporate from the market either. I spent the better part of three days trying to move mine in EC at a fairly reduced price versus the wiki. All the while I saw no less than four other players also trying to move Nocti Blades. Based upon their own constant /auctioning I'd venture to say supply is well exceeding demand at the moment and will probably continue to do so AT LEAST until even more favorable Velious items begin to trickle into the market.
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