Mike has definitely got a point with respect to the Artwork - IMO the best pure art in the BA is DC Horror. However the Superhero collectors, while attached to the artists, especially Neal Adams - are still superhero collectors. There are no identifiable characters in DC Horror. I know Doug was screaming it from the rooftops and I respect Doug's opinion - I still think that all dealer proclaimations in teh OS guide need to be taken with a grain of salt.
I still see the same bidders competign with me in Ebay and in other venues and I have actually seen less presence of a few of the guys that drove the prices up in the last 2 months. They probably have their 1-2 copies and have moved on. DC BA Horror is a grass roots movement in the hobby. There will be no movie, or popular culture extraneous circumstance to bolster the market - thank god for that.
And finally I still point to the Pre-Code stuff that has now seen a huge levelling off, besides the key issues. Ask the pre-Code guys about the demand verses price of the filler issues. Take into account that there is more BA than Pre-Code and I think Mr. Sulipa's comment while apt for the moment must be tempered with real time knowledge of the limits of DC BA Horror.
Even though I hate to use specifics to generalize - being a BA Horror Guy I still do not go outside the 4 core titles IE HOS, HOM, WWBN and TOD. A few books here and there, but I don't think that the number of completionists for the Witching Hour will ever approach Spiderman or X-Men levels or even 5% of those levels to be realistic.