Halloween Free Photo Sites
freedigitalphotos.net/images/Halloween_g164.html
21 Halloween images from freedigitalphotos.net
creepyhalloweenimages.com
Around 400 free Halloween photos in resolution up to 1600px (3000px for free subscribers)
wikipedia.org/wiki/Category:Halloween_images
Creative halloween some commons images on wikipedia
publicdomainpictures.net/hledej.php?hleda=halloween
well organised collection of PD images
Commercial Stock Photo Sites
Halloween @ istockphoto
Browse the microstock agencies categorised halloween photos and illustrations
Halloween @ Bigstock
halloween images on a microstock agency
The images above are priced from around $1