I went through a period where I was buying a lot of comic art. Here's some of the horror-related stuff:
Mummy animation cel--no idea what it's from.
(http://farm5.static.flickr.com/4104/5073833224_bb1abcb41c.jpg)
Topps tattoo art by Jack Davis
(http://farm5.static.flickr.com/4092/5073236407_d3c0068c24.jpg)
Elvira panel by Neil Vokes
(http://farm5.static.flickr.com/4151/5073832472_254f142edf.jpg)
Michael Bennett (sorry about the flash)
(http://farm5.static.flickr.com/4109/5073235685_499ca3c289.jpg)
Yours truly
(http://farm5.static.flickr.com/4110/5073831606_391cb53d81.jpg)
More: paul Fricke
(http://farm5.static.flickr.com/4085/5073234949_58ffa20f9c.jpg)
Alex Toth:
(http://farm5.static.flickr.com/4090/5073830878_6510709363.jpg)
Last panel of an Archie page
(http://farm5.static.flickr.com/4087/5073234241_21610ce418.jpg)
Bob Hope, by Owen Fizgerald, in a similar situation
(http://farm5.static.flickr.com/4124/5073233841_38a04dc546.jpg)
Illustration from a 70s or 80s version of Frankenstein (anyone have it?)
(http://farm5.static.flickr.com/4092/5073233479_d1fc4af431.jpg)
Still more: Frankenstein by Berni Wrightson
(http://farm5.static.flickr.com/4088/5073233139_98421aa3b1.jpg)
Elvira by Jim Mooney
(http://farm5.static.flickr.com/4112/5073829032_558fa7b9dd.jpg)
Back cover of "Tor Loves Betty"
(http://farm5.static.flickr.com/4088/5073828650_27d5fe3606.jpg)
A jack o'Lantern by out own Inkfink
(http://farm5.static.flickr.com/4111/5073828318_8d06882954.jpg)
Videooze magazine illustrations by Neil Vokes
(http://farm5.static.flickr.com/4088/5073231785_654885591e.jpg)
Last batch: No idea where this one is from. Came with some ad art for "who Slew Auntie Roo?", but doesn't match the printed version
(http://farm5.static.flickr.com/4129/5073231465_d80d560064.jpg)
Warren art by Jerry Grandenetti
(http://farm5.static.flickr.com/4085/5073827258_1bc99f1ab8.jpg)
A scary Monsters cover by our own Scary Terry
(http://farm5.static.flickr.com/4103/5073230759_4072b521d0.jpg)
That's a great collection you got going there my friend.