I don't know if it is a pricing error or not, but my local Walmart has Poltergeist: The Legacy Season 1 for $24.96. The lowest price online I could find was $42.
I do, I rented the first two discs from Blockbuster and was impressed. Some of the people responsible for the production have gone on to shows like Stargate SG-1 and 24 and such.
If you like the show Supernatural, this is easily the predecessor to that, but more mature. Or any kind of supernatural themed shows. Some hokey moments but overall a good show. Beware though that the show was originally a Showtime series and thus has some more mature themes too it.