I agree a dive shop has to be up front with the bottom line for potential students. We sell our OWD course as an all inclusive, we also list it on our web site (everything included in the class). Our students know once they pay for the course they do not have to pay for anything else. That includes boat fees for open water dives, heavier suits for colder water, etc. I would suggest that a shop also give a hand out to potential divers of questions to ask when shopping the course, cost, what’s included, extra expenses, etc.
Students are generally good knowing that they are paid in full..