“Right now, ebooks only make economic sense when purchased as part of a consortium. You need to be part of a larger group sharing the costs and distribution of ebooks. And your library needs to carefully consider the type of ebooks being considered.”
“For example, if you bought an ebook for $20, a group of 50 schools might buy the same book for about five times as much, or $100 instead of 50 times as much or $1,000. Given a budget of $5,000, your library could purchase 250 ebooks. However, if you pooled your $5,000 along with the other 49 schools in the consortia, the group would have $250,000 and could purchase 2,500 books at the reduced group rate.
“Given that scenario, you could have 250 books for your library or shared, unlimited, simultaneous access to 2,500 books. The math seems clear to me.”
More at the link.