u/profcommentreader

I received old aatbs text books and flash cards as well as Psychprep modules from friends. I’m wondering which site is the best for exams and test prep? Please let me know your thoughts on Psychprep vs Prepjet vs Aatbs. For example, since I have the printed materials for aatbs and psych prep, should I use another site for the exams and quizzes? Since the materials are a little older, I will need updated DSM study material. I’m probably overthinking this, but materials are so expensive! I want to make the best purchase. Thanks in advance!