If you're looking for ghost hunting equipment you should definitely try GhostStop.com. They seem to have everything with regard to technical paranormal research.
They don't have all the etherial merch like stones, taroh cards and that kind of stuff but if you're looking for serious gear you'll be pleased! They even have a store which you won't find elsewhere. They even make their own gear which has been used on shows like Ghost Adventures, ghost hunters, GHI and many more.
Very cool stuff and great people work there that know what they are doing. Oh, and they actually answer emails and phone calls, unlike the Amazon's of the world!