I've got a copy of the double sided version. Side B is in "Illusiono" with the special glasses. Bought it when first came out. Is this version hard to get and sought after? I didn't find the "Illusiono" to be that big a deal and would be just as happy with single sided version if I could get decent money for it.

They stopped producing it. The movie in the Castle set doesn't have it. Try listing on ebay or check there for past auctions. Its hard to sell on amazon because they still produce the movie without the glasses.

I picked it up from FYE for $3. Sold as used, but had never been opened.

The Illusion-O version is included in the William Castle boxed set, not the standard b&w version, but IMHO watching that is about as odd as watching it in Illusion-O but with the blue "I don't believe in ghosts" filter. The Ghost Viewer itself is likely worth some $$, though, although as most DVD's go, they're typically worth even more unopened. I don't think you'll get a ransom for it, but with Halloween and Christmas approaching, do think it will sell. FYI, Sony accidentally sold a number of those double-sided DVD's without the viewers, so there are fewer of them in circulation than you might think. I believe there's an old thread on the site about it.

I remember the old thread. Someone put a Sony customer service email address in it. I had bought the William Castle box set which has the Illusion-O version for sure. I was able to get some of the "ghost filters" from Sony using that email address.