If you can afford it take the class and may be arrange to 'share' a book that someone else has bought/is buying.
A good teacher knows how to derail those who would take over the class. If not then as a student you have the right to speak up and suggest that student wait til she can get 1 on 1 time while the rest of you work.
Often in classes you learn more than just the one technique. More than one aha moment has occurred as a result of a class. That and the social quilt [and otherwise] networking make taking a class fun.