If a campus were serious about textbook prices they would set up a LON-CAPA server (https://en.wikipedia.org/wiki/LON-CAPA https://en.wikipedia.org/wiki/LON-CAP

If a campus were serious about textbook prices they would set up a LON-CAPA server (https://en.wikipedia.org/wiki/LON-CAPA https://en.wikipedia.org/wiki/LON-CAPA) and employ a dedicated instructional faculty member to maintain the questions database. What students are really paying for is the online homework (the Canada-based Top Hat is a venture-capital based upstart, otherwise each publisher has their own system) because faculty are just too overworked with grading the stuff. Politically it's easier to shift the burden to the students (and mandatory homework doesn't even count as tuition) than finding funding for the Loncapa maintenance man or the teaching assistant that helps grade the stuff.