Another option: Amazon.com has several "Horror Collection" DVD sets which contain early horror classics at very resonable prices.
Do a search on Amazon.com for "Horror Collections" or "Horror Classics" and you will find many very good selections.
Here's one of the largest:
Horror Collection - 250 Movies (2007) - $49.97 plus free 2nd day air for Prime members
Run Time : 313 Hours 6 Minutes
On 60 Double Sided DVD's
Synopsis: The Horror 250 Movie Pack gathers an amazing collection of classic and contemporary chillers including Nosferatu, Phantom of the Opera, The Hunchback of Notre Dame, The Little Shop of Horrors, House on Haunted Hill, Bad Taste, Mama Dracula and Night Train to Terror. Stars found in this amazing collection include Bela Lugosi, Vincent Price, Boris Karloff, Barbara Steele, Keenan Wynn, David Janssen, Louise Fletcher and many more. Never before have so many movies been offered in one amazing collection and packaged in a stunning foil collectors box.
Below follows a list of all the 250 Titles.
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Alien Contamination (1981)
Alien Species (1996)
All the Kind Strangers (1974)
Alpha Incident, The (1977)
Amazing Mr. X, The (1948)
Amazing Transparent Man, The (1960)
Anatomy of a Psycho (1961)
Ape Man, The (1943)
Ape, The (1940)
Assignment: Outer Space (1960)
Astral Factor, The (1976)
Atlas in the Land of the Cyclops (1961)
Atom Age Vampire (1960)
Atomic Brain, The (1964)
Atomic Rulers of the World (1964)
Attack From Space (1964)
Attack of the Giant Leeches (1959)
Attack of the Monsters (1969)
Bat, The (1959)
Bat, The (Silent) (1926)
Beast of the Yellow Night (1971)
Beast of Yucca Flats, The (1961)
Black Dragons (1942)
Blood Tide (1982)
Bloodlust (1959)
Bloody Pit of Horror (1965)
Bluebeard (1944)
Bowery at Midnight (1942)
Brain Machine, The (1977)
Brain That Wouldn't Die, The (1962)
Bride of the Gorilla (1951)
Buried Alive (1939)
Cabinet of Dr. Caligari, The (1920)
Carnage (1983)
Carnival of Souls (1962)
Chloe, Love is Calling You (1934)
City of Missing Girls (1941)
Cold Room, The (1984)
Colossus and the Amazon Queen (1960)
Colossus and the Headhunters (1960)
Condemned to Live (1935)
Corpse Vanishes, The (1942)
Cosmos: War of the Planets (1977)
Counterblast (1948)
Creature from the Haunted Sea (1961)
Crimes at the Dark House (1940)
Crimes of Stephen Hawke, The (1936)
Crooked Circle, The (1932)
Crypt of the Living Dead (1973)
Curse of the Headless Horseman (1974)
Daughter of the Tong (1939)
Day the Sky Exploded, The (1958)
Dead Men Walk (1943)
Death Warmed Up (1984)
Dementia 13 (1963)
Destroy All Planets (1968)
Devil Bat, The (1941)
Devil Monster (1946)
Devil's Daughter, The (1939)
Devil's Messenger, The (1962)
Devil's Partner (1962)
Devil's Sleep, The (1949)
Disappearance of Flight 412, The (1974)
Doomed to Die (1940)
Doomsday Machine, The (1972)
Dr. Jekyll and Mr. Hyde (1920)
Drums of Africa (1941)
Dungeon of Harrow, The (1962)
Eegah (1962)
Embalmer, The (1965)
Embryo (1976)
End of the World, The (1977)
Eternal Evil (1985)
Evil Brain from Outer Space (1956)
Face at the Window, The (1939)
Face in the Fog, A (1936)
Fatal Hour, The (1940)
Fire Monsters Against the Son of Hercules (1962)
First Spaceship on Venus (1960)
Frankenstein 80 (1972)
Frozen Alive (1966)
Fury of the Wolf Man (1972)
Galaxy Invader, The (1985)
Gamera the Invincible (1966)
Ghost and the Guest, The (1943)
Ghost Walks, The (1934)
Ghosts on the Loose (1943)
Giant Gila Monster, The (1959)
Giants of Rome (1964)
Goliath and the Dragon (1960)
Good Against Evil (1977)
Gorilla, The (1939)
Grave of the Vampire (1972)
Green Eyes (1934)
Hands of Steel (1986)
Head, The (1959)
Hercules Against the Moon Men (1964)
Hercules and the Captive Women (1961)
Hercules and the Masked Rider (1963)
Hercules and the Tyrants of Babylon (1964)
Hercules Unchained (1959)
Horrors of Spider Island (1962)
House of Danger (1934)
House of Mystery (1934)
House of Secrets (1936)
House of the Dead (1978)
House of the Living Dead (1973)
House on Haunted Hill, The (1959)
How Awful About Allan (1970)
Hunchback of Notre Dame, The (1923)
I Killed That Man (1941)
Idaho Transfer (1973)
Incredible Petrified World, The (1957)
Indestructible Man (1956)
Invisible Ghost, The (1941)
Invisible Killer, The (1941)
Island Monster, The (1954)
Killer Shrews, The (1959)
Killers From Space (1954)
Killers of the Sea (1937)
King of the Zombies (1941)
Kiss Me Kill Me (1971)
Kong Island (1968)
Laser Mission (1990)
Last Man on Earth, The (1960)
Last Woman on Earth (1960)
Lion Man, The (1936)
Little Shop of Horrors, The (1960)
Long Hair of Death, The (1964)
Lost City, The (Part 1 and Part 2) (1935)
Lost Jungle, The (1934)
Lost World, The (1925)
Lucifer Complex, The (1978)
Maciste in Hell (1925)
Mad Monster, The (1942)
Man with Two Lives, The (1942)
Manfish (1956)
Maniac (1934)
Manos: The Hands of Fate (1966)
Manster, The (1962)
Mesa of Lost Women (1953)
Metropolis (1927)
Midnight Phantom (1935)
Midnight Shadow (1939)
Midnight Warning, The (1932)
Mistress of Atlantis, The (1932)
Mole Men against the Son of Hercules (1961)
Monster from a Prehistoric Planet (1967)
Monster Maker, The (1944)
Monster Walks, The (1932)
Moon of the Wolf (1972)
Murder at Midnight (1931)
Murder in the Red Barn (1935)
Nabonga (1944)
Never Too Late (1937)
Night America Trembled (1957)
Night Evelyn Came Out of the Grave, The (1971)
Night Fright (1968)
Night of the Blood Beast (1958)
Night of the Living Dead (1968)
Night Tide (1961)
Nightmare Castle (1965)
Nightmare Never Ends, The (1980)
Nosferatu (1922)
One Body Too Many (1944)
One Frightened Night (1935)
One Step Beyond - Peter Hurkos Story, The (Part 1) (1960)
One Step Beyond - Peter Hurkos Story, The (Part 2) (1960)
Panic (1976)
Passenger to Bali, A (1950)
Phantom Creeps, The (1939)
Phantom Express, The (1932)
Phantom from 10,000 Leagues, The (1956)
Phantom From Space (1953)
Phantom of 42nd Street, The (1936)
Phantom of Soho, The (1964)
Phantom of the Opera, The (1925)
Phantom Planet, The (1961)
Phantom, The (1931)
Piranha, Piranha (1972)
Planet Outlaws (1953)
Prehistoric Women (1950)
Prisoners of the Lost Universe (1984)
Purple Death from Outer Space (1940)
Queen of the Amazons (1947)
Radio Ranch (1940)
Return of Dr. Mabuse, The (1961)
Revolt of the Zombies (1936)
Ring of Terror (1962)
Robot Pilot (1941)
Rocky Jones, Space Ranger: Crash of the Moons (1954)
Rocky Jones, Space Ranger: Menace from Outer Space (1956)
Rogues Tavern, The (1936)
Sadist, The (1963)
Santa Claus Conquers the Martians (1964)
Savage Girl, The (1932)
Scared to Death (1946)
Scream in the Night, A (1935)
Screaming Skull, The (1958)
Shadow of Chinatown (1936)
Shadow of Silk Lennox, The (1935)
She Gods of Shark Reef (1958)
She-Beast, The (1966)
Shock (1946)
Shot in the Dark, A (1935)
Shriek in the Night, A (1933)
Sisters of Death (1977)
Snow Creature, The (1954)
Snowbeast (1977)
Son of Hercules: The Land of Darkness (1963)
Son of Ingagi (1940)
Sound of Horror (1964)
Star Odyssey (1979)
Strange Adventure, A (1956)
Strangers of the Evening (1932)
Swamp Women (1955)
Tales of Frankenstein (1958)
Teenage Zombies (1959)
Teenagers From Outer Space (1959)
Tell-Tale Heart, the (1960)
Terror at the Red Wolf Inn (1972)
Terror Creatures from the Grave (1965)
Terror, The (1963)
They (1974)
They Came From Beyond Space (1967)
Thirteenth Guest, The (1932)
This is not a Test (1962)
Ticket of Leave Man, The (1937)
Tormented (1960)
Torture Ship (1939)
UFO: Target Earth (1974)
Unknown World (1951)
Vampire Bat, The (1933)
Vampire's Night Orgy (1973)
Voyage to the Planet of Prehistoric Women (1968)
Voyage to the Prehistoric Planet (1965)
Vulcan, Son of Jupiter (1961)
Walking Nightmare, A (1942)
Wanted: Babysitter (1975)
War of the Robots (1978)
Warning From Space (1956)
Warriors of the Wasteland (1983)
Wasp Woman, The (1960)
Werewolf of Washington, The (1973)
Werewolf Woman (1976)
White Gorilla, The (1945)
White Pongo (1945)
White Zombie (1932)
Wild Women of Wongo (1958)
World Gone Mad, The (1933)