I don't want distribution channels singlehandedly pricing things. That power only leads to abuses as well.
eBooks should be priced by the "maker", but private people should be able to sell their copy, to provide pressure on the market kinda like used cars do to new cars. Personally I think ebooks would be well served at 2.99 or so a for the average book, instead of pricing them as if they still had to support large book stores and all the inbetweens from there back to the printer plus disposing of unsold copies.
Some books have to be expensive for the author to recoup their cost for a limited audience who won't care if the book is $100 or $125. You know, studies of the dung of wood beetles devouring maple flooring complete with color pics, etc. And at $5, it's not going to sell any more copies and we just get the tyranny of the mainstream, where everyone shoots for a piece of the bellcurve near the middle.
At the same time, the textbook market would collapse for the most part if most institutions went the way of the japanese and printed 6 week sheets to give to HS and undergraduate college students. Since these subjects don't change all that much, it would be trivial if all the highschools in one state banded together to get this done. And then have that effort domino effect.