A Billboard article a while back mentioned that when SOI hit stores, the U2 back catalog would also be available at retailers for a "reduced price." At my local indie, I found this to be the case--except for the "reduced price" part.
The U2 section was much bigger than usual, with brand new copies of all the single disc remasters as well as a few of the deluxe editions. However, the prices were anything but reduced. Single disc remasters were $10.99 or $11.99, Joshua Tree and Achtung Baby deluxe were $29.99, and Unforgettable Fire deluxe was a whopping $34.99! These prices are higher than they were when the albums were first released!
EDIT: In fairness, though, my indie was selling SOI deluxe for $14.98, cheaper than Target, Best Buy or amazon...