I really am not sure why this has never even seen a DVD release, never mind Blu-Ray.
It has a large cult following and is in my opinion the best of the sword and sorcery films from the 1980s.
There have been numerous fan made trailers on Youtube. Here is one for example.
https://youtu.be/yboqC4SXbug
But the movie just looks visually stunning. And the problem is, the VHS from what I have read has been cropped down heavily from the original 2.35:1. You can even see a few signs where they have panned the screen during the fight scenes. Seeing this film in Blu-Ray in its original 2.35:1 would be amazing in my opinion. But nobody has released it for some reason.