We do not catalog information about videos, and we do not sell anything ourselves. IMDb is part of the Amazon.com group of companies: we simply link to their catalog as a service to our visitors but all sales of videos, music, books, and more are handled directly by Amazon.com.
We do not attempt to accurately catalog books and other merchandise, but rely on Amazon's search function.
Because our focus is not sales, we list every film/TV show we are aware of that meet our criteria for inclusion, whether or not they are available on video or ever have been; in some cases, there are no known copies remaining in any form. This is not unlike an encyclopedia that lists animal species that are extinct.
There are two ways to determine whether a particular title is available on video at Amazon.com: