Ethan,
To determine the value of your decanters, you can purchase a copy of the Bottle Collectors Pocket Price Guide right on this website. Just go to the home page and you will be directed from there. It is inexpensive and invaluable in determining what your decanters are worth. After that you will be better equipped to determine how to go about disposing of them either to a single collector or individually on one of the internet auction sites. Most interested people would also like to know your location ( city ) in order to give them an idea of whether a pick-up would be feasible for them. That`s information that you should post here, as shipping that many decanters to a single location would probably be cost prohibitive. Get yourself a price guide and good luck.