There have been lots of good and bad documentaries and bio-pics about Marilyn over the years. If there is a particular title you are looking for I might have it available at http://www.marilynmonroe.ca/dvds/
I also have films, Korea footage and the Christies Auction. Some of my favourites that I recommend are Marilyn vs Marilyn, The Last Interview and The Untold Story starring Catharine Hicks as Marilyn.
If you have any questions please let me know.