UNZ.org gathers the rights to out of print magazine and books, collects orphaned videos and more and makes them all available online for researchers and the curious. (They also have offered awards for researchers who use their archive in new and interesting ways.)
Check out the list of SF/F/Horror titles here (including 44 issues of Weird Tales), they also have Mysteries and much, much more in their periodical collection.
Take a look around and tell me if you find any gems.
Sea of Stars RPG Design Journal 