Textbooks can be expensive, but students can often get a bargain by shopping around. Refer them to these links for more information:

Where to Find Textbooks on the Cheap : an article from bargain-hunting site RetailMeNot lists 11 options for renting or buying textbooks.

TextbookRentals.com lets students compare prices from several textbook providers. 

Students can rent a physical copy for $40 or an ebook copy for $50. Almost reasonable, right?  

IMPORTANT! Please provide your students with the ISBN,  the International Standard Book Number, so that they get the exact edition they need!