Is there any way to avoid paying for MindTap/online Ebook platforms?

I have to pay $100+ for all my classes to access quizzes/required assignments through platforms like mindtap and mcgraw hill and I’m just wondering if anyone has found a way to work around that. I know how to find the reading material online for free but if anyone knows how to get mindtap course codes for cheaper than theyre listed on the campus bookstore website PLSS lmk I would greatly appreciate it. I know you can temporarily gain access for 2 weeks but I’m looking for a long term solution (if it exists). Thank you!