Vintage Halloween

Archive.org is host to a plethora of information. Among their incredible online collections are old radio programs, vintage television shows, and a number of free, public domain films. You can watch online or download them, all legally. They have a great collection of SciFi/Horror, which can be found here:

http://www.archive.org/details/SciFi_Horror

With films like Night of the Living Dead, The Last Man on Earth
starring Vincent Price, and 1922's Nosferatu, there's something for everyone.

Also found in Archive.org's comedy collection is classic spooky comedy such as Topper Returns and the East Side Kids and Bela Lugosi in Spooks Run Wild, both from 1941.