My father collected magazines for many years and has since passed. My brothers and I are in the process of helping my mother move into a retirement community and she has decided to let the collection go. There are many magazines into the teens, some earlier reprints, and -- I believe -- complete years from the 20's on. We are looking to learn what value these magazines may have for collectors, how to summarize the collection to make available to sell and so on. Can anyone give some advice on how to proceed or direct me to appropriate resources?