go to wal-mart and get every damn horror movie that you can find in the bargain bin.... they have a lot of great selections to choose from, well that is if you find it when it is just filled up..and if you like Italian horror (demons & demons 2) I`d add some Fulci to your collection...
Get TCM II and III
if you order online here are some links
cduniverse.com
Horror Movies.com
overstocked.com diabolikDVD
diabolik DVD is expensive but I usually browse through just to find obscure horror...
If you dont order online here are the best places to purchase horror... Circuit City, Wal-mart, target, & best buy... sometimes you can find some good deals at Suncoast