Actually, guys, the publishers are just doing what they have always done. Heartsong was first published in 1984. Mirror Image was first published in 1990. These are old (really old) backlist titles.
Publishers work from most expensive to least expensive. Hardcover, then trade paperback (sometimes released simultaneously with the hardcover), mass paperback. Think about the price difference between a hardcover and a mass paperback. All this really tells me is that publishers are embracing the digital format as a form of the mass market paperback.
With all of these titles, the publishers ALREADY MADE THEIR MONEY on the higher-priced points. Anything now is gravy. If anything, indies should learn something from them. You can always drop your price. It is almost impossible to raise it. Start at a higher price point at release, and then gradually lower the price to capture other price markets.
If you look at the new releases, publishers are continuing to maintain the higher price points.