I don't think prices are going to lower unless they increase drop rates or add another place for these to drop. Keep in mind these aren't buyable from vendors, nor are they a semi-common drop from abyssea chests.
If anything, they're going to increase in price once the woe craze ends (during jp hours on odin the higher level fluxes usually fill up within 30 seconds of starting >_>)
Really, if you think about how many people have been doing woe compared to how little scrolls have been on the ah, the drop rates are pretty terrible :( Has have to been literally thousands of individual runs completed by now, and while I'm sure some people are keeping/using/giving away scrolls, most of them probably end up on the ah.
Hope I'm not breaking any copyright laws. But his art is awesome!